Abstract: A gunstock including a barrel brace and a pistol grip projecting downwardly from the rear of the barrel brace. An X-shaped crosspiece projects rearwardly from the pistol grip. A butt projects rearwardly from the crosspiece. A handle projects forwardly from the bottom of the pistol grip.

Abstract: An integrated grip and rail system is provided. Included is a firearm and the firearm grip. The grip is configured to be disposed in front of the magazine well and provide a stable grip point which does not allow a user's thumb or other appendage to be disposed between the grip and magazine well. The grip is configured so as to not interfere with the pivoting relationship between the weapon upper and weapon lower during partial or complete disassembly of the weapon. The rear region may also have a portion extending rearward along at least part of each side of the magazine well to form feed ramps as a part of the magazine well extension. Included is a magazine well extension mechanically coupled to a forearm rail system for mounting to the firearm.

Abstract: Adapter devices, apparatus, systems and methods of allowing a firearm to be supported by a foldable fore grip/gun handle. The fore grip gun handle can have bipod type legs that can be extendable from the handle. The fore grip handle can be just a vertical extension. The adapter can allow for the fore grip/gun handle to move from a fold back position along the bottom of the firearm so that the firearm can be easily carried, and the adapter to can allow for the handle to move down to a vertical support position beneath the firearm when the firearm is to be used. The adapter can also support a light in both a folded position and in a downwardly extended position, where light can be aimed forward, rearward to the side and/or pointed down from the firearm. The adapter can allow for a dual functioning component that can be either or both a fore grip and/or a light source.

Abstract: Firearm grips and firearm grip construction stets are disclosed. An example firearm grip includes a plastic grip portion includes a first lateral side defining a plurality of first ribs and a first recess and a second lateral side defining a plurality of second ribs and a second recess. The firearm grip also includes a first grip shell having a plurality of edges to slidably engage under one or more of the first ribs. The first grip shell includes a first lug that is received by the first recess to hold the first grip shell in place. The firearm grip also includes a second grip shell having a plurality of edges to slidably engage under one or more of the second ribs. The second grip shell includes a second lug that is received by the second recess to hold the second grip shell in place. The firearm grip also includes a grip back coupled to the grip portion with a tongue and groove connection and a transverse pin extending therethrough.

Abstract: Embodiments of the present invention comprise a tool that can be configured for use as the grip of a firearm. In one embodiment, the tool comprises a handle part and a tooling part coupled to the handle part. The tooling part can be configured to receive one or more end effectors. The handle part can comprise one or more elongated sections on which are disposed a handle body, where in one construction the elongated sections are interleaved in a manner that permits the handle body to move amongst a plurality of working configurations.

Abstract: A system for resolving at least one use parameter relating to a firing of a machinegun or of a semi-automatic firearm having a receiver, an action within the receiver and that includes a piston, and a buffer tube that receives at least a portion of the piston during a cycling of the action in response to a recoil. The system includes: a display configured to display at least an indication of at least one use parameter; a sensor disposed in the buffer tube, the sensor sensing a cycling of an action via movement of the piston in the buffer tube; a processor that receives sensed data from the sensor and, based on the received sensed data, calculates the at least one use parameter, the processor causing the display to display the at least an indication; and a power source disposed in the stock or the display and energizing the sensor, the processor, and the display.

Abstract: An improved firearm having a barrel coupled to an upper receiver where the receiver includes a passageway extending generally parallel to the longitudinal axis, and a guidance feature extending along the passageway generally parallel to the longitudinal axis. The firearm also includes a lower receiver coupled to the upper receiver and a recoil spring assembly comprising a mating attachment structure and a disassembly button disposed on a lateral side of the upper receiver. The mating attachment structure is attached to an attachment structure of the lower receiver to attach the lower receiver to the upper receiver. Actuation of the disassembly button detaches the mating attachment structure from the attachment structure to detach the lower receiver from the upper receiver.

Abstract: A firearm including a barrel having a chamber and an integrally formed upper receiver having a passageway, an accessory rail extending the complete length of the upper receiver, and a guidance feature extending along the passageway. The firearm also includes an operating rod having an anti-bounce mechanism, a bolt that is rotated counter-clockwise to lock against the chamber, a bolt carrier having a safety extension disposed below the bolt that prevents a hammer from striking a firing pin until the bolt is locked against the chamber, a lower receiver, a recoil spring assembly, and a fire control group. The bolt includes a polymer spring that biases a sliding extractor against the base of a cartridge. The sliding extractor is disposed at an angle ranging from thirty degrees to fifteen degrees on the bolt face to provide a low ejection angle from the firearm.

Abstract: A rifle stock having one or more cavities for receiving recoil reducing mechanisms is provided.

Abstract: A gunstock including a barrel brace and a pistol grip projecting downwardly from the rear of the barrel brace. An X-shaped crosspiece projects rearwardly from the pistol grip. A butt projects rearwardly from the crosspiece. A handle projects forwardly from the bottom of the pistol grip.

Abstract: A mounting rail for a firearm is disclosed. The mounting rail may be a picatinny rail, a weaver rail, or the like, which allows tools such as lights or lasers to be attached to a firearm. The mounting rail is reversible and may be mounted within a portion of the firearm, such as the forend. The other side of the rail may match the finish and texture of the firearm so that the mounting rail is hidden from view when reversed.

Abstract: A monopod for a firearm is disclosed. The monopod has a body and a leg that can extend from the body. The monopod may fit into a pistol grip of a firearm, such as a rifle. Once installed, the leg of the monopod may be extended from the pistol grip of the firearm and secured by a pin. When the leg is retracted into the body, the leg is kept in place by the pin, which opposes a force provided by a constant force spring. The monopod may be used by a user to stabilize the firearm on a surface.

Abstract: A tactical firearm having a receiver and a handguard connected by flanges that are secured by fasteners and each define co-planar rail mounting surfaces. A one-piece elongate sight mounting rail extends along the combined length of the receiver and handguard and has a mounting surface in face to face relation with the rail co-planar rail mounting surfaces of the receiver and handguard. The rail is tapered along its length to provide an angle of cant and to permit mounting sight devices an any desired location along its length. A barrel extends through the handguard and is secured to the receiver in a manner achieving clearance and thermal isolation of the handguard from the barrel and barrel retainer.

Abstract: A handle (20) for rapidly firing a semi-automatic firearm (22) having a trigger (24). The handle (20) includes a grip portion (52) defining a channel (54). A block (60) that is connected to the firearm (22) is slidably disposed in the channel (54) for allowing longitudinal movement of the firearm (22) relative to the handle (20). The handle (20) also includes a trigger guard (66) disposed on one side of the trigger (24) and extending longitudinally forward of the trigger (24) by a predetermined distance (D) to an open end. The trigger guard (66) presents a finger rest (70) for placing a trigger finger (74) on the trigger guard (66). The trigger guard (66) restricts access to the trigger (24) until the firearm (22) is moved longitudinally forward by the predetermined distance (D) relative to the handle (20).

Abstract: A long arm grip enhancing device for installation on the front grip portion of the stock on a long arm such as a rifle, a shotgun, a muzzle loader, and the like. The long arm grip enhancing device of the present invention is composed of resiliently deformable material that provides each user with a uniquely customized grip. The present long arm grip enhancing device is usable as an after-market add-on for conventional long arm stocks as well as small arms while the majority of prior art grip enhancement devices are only compatible with small arms such as handguns and pistols that have removable side panels to which the prior art grip enhancement device is secured. The long arm grip enhancing device of the present invention is fully compatible with long arm stocks that are typically of a unitary construction and may be composed of a wide range of materials.

Abstract: A semi-automatic or automatic rifle is provided. The semi-automatic or automatic rifle includes a receiver having an integral hand guard portion, a barrel having a bore. The bore is removably connected to the receiver, the hand guard portion extending over and surrounding the barrel, an indirect gas operating system has a gas block and a piston. The gas block has a cylinder, the gas block is fitted to the barrel, the cylinder is in communication with the bore. The piston has a piston end and a striking end, the piston end is fitted to the cylinder and has a bolt carrier having a striking surface. When a cartridge is fired, gas displaces the piston end and causes the striking end to strike the striking surface displacing the bolt assembly, wherein, the cylinder and the piston are together removable as an assembly from the firearm without disassembly of the rifle.

Abstract: An adjustable firearm grip which is adaptable for use on a wide range of firearm types and barrel sizes. The adjustable firearm grip generally includes a handgrip including an upper opening and a lower opening. A passageway extends from the upper opening to the lower opening and includes a connector slidably positioned therein. A strap is provided for extending around a firearm, wherein both ends of the strap are each connected to the connector and the strap extends upwardly from the upper opening of the handgrip. A strap bolt and adjustment knob are threadably attached to the connector. The adjustable firearm grip may be attached to a firearm by placing the strap around the firearm's barrel at any location and then turning the adjustment knob to tighten the strap for a firm fit.

Abstract: A collapsible buttstock which is adapted primarily for use with military and tactical carbines, is supported by an extension tube which is connectable to the receiver of a carbine on which the collapsible buttstock is to be mounted. A storage enclosure is formed in the body of the buttstock and is sized and dimensioned so that it can receive a clip or magazine, typically able to carry 20 rounds, that is usable with the carbine on which the collapsible buttstock is mounted. The enclosure is provided with an openable cover that is hingably attached to the buttstock body. An easily operable cover latch assembly is usable to secure the cover in a closed position while facilitating expeditious opening of the cover to afford access to the spare magazine storage enclosure.

Abstract: A mounting rail for a firearm is disclosed. The mounting rail may be a picatinny rail, a weaver rail, or the like, which allows tools such as lights or lasers to be attached to a firearm. The mounting rail is reversible and may be mounted within a portion of the firearm, such as the forend. The other side of the rail may match the finish and texture of the firearm so that the mounting rail is hidden from view when reversed.

Abstract: A magazine storage device is disclosed. The magazine storage device is part of an end stock assembly for a long gun and may have a plate that is formed to complement the shape of a magazine. The magazine storage device may secure a magazine in a recess. The magazine may be frictionally secured. The magazine may be flush with the end stock when inserted.

Abstract: A buttstock shoulder stabilizer includes a locator ball having a radially-projecting threaded cylindrical stud that screws into the sling mount of the buttstock endplate of assault rifles, and a socket assembly that mounts on a soldiers flak jacket near his shoulder. The ball can be machined from a structural metal or made of thermoplastic injection molded about the cylindrical stud. The socket assembly has an oblong horizontally-disposed socket connected to a lower approach ramp. A wall surrounds upper and side portions of the socket and the side edges of the approach ramp. When the soldier brings his weapon to firing position, the ball slides up the access ramp an into the oblong socket. The socket assembly is preferably injection molded from a tough structural thermoplastic resin. The socket assembly is provided with slots which enable it to be strapped to a soldiers flak jacket near his shoulder.

Abstract: A hand guard rail system is fastened to a firearm having a barrel and a barrel nut, with the hand guard rail aligned to the top rail of the firearm. The hand guard rail system includes a hand guard and a sleeve fitted into the hand guard. The sleeve and the hand guard are fastened to the barrel nut, thereby aligning the hand guard to the firearm.

Abstract: A kit for providing a handgrip on a firearm includes a handgrip body mountable on a handgrip body mounting structure of the firearm. The handgrip body includes an ammunition storage space therein. The ammunition storage space defines a storage space opening in a surface of the handgrip body through which a round of ammunition can be inserted into the ammunition storage space. A storage space cover has a primer recess within an ammunition support surface thereof and is attached to the handgrip body in a manner allowing the storage space cover to be moved between an open position in which access to the storage space opening is provided and a closed position in which the ammunition support surface extends over the storage space opening. A portion of the primer recess overlies a primer occupying region of the ammunition storage space when the storage space cover is in the closed position.

Abstract: Devices, and methods of attaching accessory mounts to vertical fore grip handles on firearms, such as rifles. The accessory mounts can be molded to extend off of the handles. The accessory mounts can attach to the handles by interlocking plugs and slots. The accessory mount can have rails so that an accessory can attach to the rails on the accessory mount. The accessory can include lights, lasers, bayonets, sights, scopes, and the like. The vertical fore grip can be an elongated handle fixed to the firearm. The vertical fore grip can be an elongated handle that is detachable from beneath rails on the firearm. The vertical fore grip can include expandable bipod legs.

Abstract: This presented invention relates to the ability of individual, firearms owners and representatives of the law enforcement; military and governmental entities, to enhance the pointability and shootability of their firearms, there is provided a firearm accessory including a firearm, a body including at least one securer for readily securing said firearm to the firearm accessory, wherein the securer is selected from the group consisting of: a grip securer, a racker and a trigger guard securer.

Abstract: Adapter devices, apparatus, systems and methods of allowing a firearm to be supported by a foldable fore grip/gun handle. The fore grip gun handle can have bipod type legs that can be extendable from the handle. The fore grip handle can be just a vertical extension. The adapter can allow for the fore grip/gun handle to move from a fold back position along the bottom of the firearm so that the firearm can be easily carried, and the adapter to can allow for the handle to move down to a vertical support position beneath the firearm when the firearm is to be used. The adapter can also support a light in both a folded position and in a downwardly extended position, where light can be aimed forward, rearward to the side and/or pointed down from the firearm. The adapter can allow for a dual functioning component that can be either or both a fore grip and/or a light source.

Abstract: A bipod support to support a firearm. There is a leg support. There are two legs, where each of the legs includes a support end. The support end includes a pin hole. The leg support includes two leg slots to receive one of the two legs. The leg support includes two pin holes. The support ends attached to the leg support by placing each of the support ends in one of the leg slots and inserting a pin into the pin holes of the leg support and the support end of the legs. There is a spring between each of the leg slots and each of the support ends of the legs. There is a ball to be mounted to a rifle stock. The ball is spherical in shape with two flat entrance sides on the ball. There is a ball mount receiver to receive the ball.

Abstract: A hand guard attachment assembly for a firearm having a barrel and a receiver fastened to the barrel by a barrel nut. The hand guard attachment assembly includes a forearm having a monolithic mounting rail/hand guard that is removably connected to the receiver. The monolithic rail/hand guard interfaces with an integral multi-slot mounting portion of the receiver. A cinch block is mated to the slots of the receiver and held in place by the monolithic rail/hand guard. A tension block is mated at one end of the monolithic rail/hand guard and is attached to the cinch block by a fastener to securely hold the monolithic rail/hand guard in place.

Abstract: A modular firearm is disclosed. The firearm that can be configured to operate using ammunition of different calibers via interchangeability of only a few parts. The firearm includes a foldable butt stock assembly for quickly and easily converting the firearm from an extended operating configuration to a compact transport configuration, and vice-versa. Additionally, the firearm includes a modular hand guard assembly having multiple mounting platforms for accommodating a variety of different accessories.

Abstract: A semi-automatic or automatic rifle is provided. The semi-automatic or automatic rifle includes a receiver having an integral hand guard portion, a barrel having a bore. The bore is removably connected to the receiver, the hand guard portion extending over and surrounding the barrel, an indirect gas operating system has a gas block and a piston. The gas block has a cylinder, the gas block is fitted to the barrel, the cylinder is in communication with the bore. The piston has a piston end and a striking end, the piston end is fitted to the cylinder and has a bolt carrier having a striking surface. When a cartridge is fired, gas displaces the piston end and causes the striking end to strike the striking surface displacing the bolt assembly, wherein, the cylinder and the piston are together removable as an assembly from the firearm without disassembly of the rifle.

Abstract: A gunstock system is disclosed for use with a gun action and a gun floorplate of a gun. The gunstock system comprises a gunstock having a buttstock portion, a midstock portion, and a forestock portion, with the gunstock defining a cavity. The system further includes an insert assembly removably positionable in the cavity of the gunstock. The insert assembly has a top surface contoured to engage a gun action, and a bottom surface contoured to engage the gun floorplate.

Abstract: A rifle with an upper receiver and a barrel attached to the upper receiver and including a bolt carrier, and operating, buffer, and cooling systems. The operating system includes a cylinder and a piston coupled to receive propelling gases from the barrel. As the piston moves between retracted and extended positions the bolt carrier is moved between closed and open positions. The bolt carrier includes a weight movable within a guide frame between rearward and forward limits. The buffer system includes a compression spring in a tube attached to the upper receiver in abutting engagement with the bolt carrier. A partially fluid filled cylinder is attached to a coil of the spring and includes a piston and shaft. The piston is formed so that fluid in the cylinder restricts movement in one direction and allows free movement in a second direction.

Abstract: A collapsible firearm stock system is generally provided and preferably includes a shoulder stock system adapted to receive a buttstock thereon, and a locking linkage having a first linkage portion, a second linkage portion, and a hinge pin operatively uniting the first and said second linkage portions. One of the linkage portions is carried by the shoulder stock assembly so as to define a terminal end therefore, the other of the linkage portions being adapted to be carried by a firearm. Each of the linkage portions are adapted so as to automatically unite in locking engagement upon axial alignment of the shoulder stock assembly with the firearm about the hinge pin.

Abstract: The present invention is related to weapons systems. In particular, the present invention is directed to accessory attachment systems for rifles and small arms weapons that enable attached accessory devices to draw power from a central power source and communicate with the user and/or other devices.

Abstract: A magazine well extension for a firearm having a magazine well in a lower receiver, the magazine well extension including a substantially hollow body including a magazine well extension portion, for covering and extending beyond an opening of the magazine well of the firearm, the magazine well extension portion being adapted and configured to guide a magazine into the magazine well of the firearm and coupling elements for coupling the body about the lower receiver of the firearm. The inner surface of the body is contoured to conform to the outer surface of the lower receiver, and the body is shaped as a grip, for use as a fore grip on the firearm.

Abstract: The invention relates to a protective cover which is intended for sporting rifles that comprise screws (2) which are used to fix a shell propulsion mechanism (3) to a rifle support (4). The invention is characterised in that the dimensions of the cover (5) are pre-determined as a function of the area to be covered, said area to be covered including the heads (1) of the screws (2) which are used to fix the shell propulsion mechanism (3) to the support (4). The invention is further characterised in that it comprises means for fixing the cover to the sporting rifle.

Abstract: A method and apparatus are disclosed for substituting a different stock, or a different receiver assembly, in a long gun (e.g., a shotgun) without the use of tools by a user in the field. Applicants' preferred apparatus comprises: a long gun (e.g., an illustrated shotgun) having a stock and a receiver assembly; and an adaptor assembly which removably interconnects the stock to the receiver assembly, wherein the adaptor assembly includes: an adaptor base affixed to the receiver; an end of the stock is mounted onto the adaptor base; and a rotatable locking pin, continuously attached to the base, which can be lifted up and rotated or turned on its axis by 90° to unlock the adaptor assembly. The stock can then be pulled off the adaptor base. Upon a new stock being mounted on the adaptor base, the locking pin can be rotated back to its original orientation and pushed down to lock the adaptor assembly, whereupon the adaptor assembly interconnects the substitute stock with the receiver assembly.

Abstract: A collapsible stock which includes a stock body having a buffer tube holder, a firearm buffer tube slidingly mounted in the buffer tube holder, the stock body being arranged for linear reciprocating motion relative to the buffer tube during firing of the firearm, a recoil absorbing mechanism mounted inside the stock body and affixed to the buffer tube, and a locking pin mounted through the stock body and affixed to the buffer tube, the stock body being arranged for motion relative to the locking pin during firing of the firearm.

Abstract: A metal heat shield insert is provided for installation into the lower hand guard of an integrated rail system. The heat shield is received and supported in a pair of opposing mounting channels that are formed on the inside of the lower hand guard. The body of the heat shield includes a plurality of venting holes to permit air to flow through the heat shield. When the heat shield is installed in assembled relation with the hand guard, the venting holes in the heat shield are offset in location from the venting holes in the hand guard to provide an indirect venting arrangement.

Abstract: The present disclosures are systems, apparatus and methods for communicating with a robot via a weapon. In one embodiment, the weapon comprises a barrel, a receiver assembly, a handgrip, and a first controller. The receiver assembly is coupled to an end of the barrel and to the handgrip. The first controller is integrated into the handgrip and inputs a first controller signal to a processing device. A transmitter receives a processing signal from the processing device according to the first controller signal. Preferably, the transmitter sends the processing signal to a robot, which responds accordingly to the received processing signal.

Abstract: A composite receiver for a firearm having a skeletonized body formed from a metal and having a series of ports formed therein. A cover shell is applied over the receiver body to cover and substantially seal the ports.

Abstract: A firearm butt stock with an adjustable cheek piece comprises an elongate stock base having a top, a bottom, a right side, a left side, a proximal end and a distal end. The stock base has a transverse pivot shaft near the stock base top and a transverse catch shaft spaced from the pivot shaft lengthwise of the stock base near the stock base top. A cheek piece has a proximal end and a distal end and a left and a right sidewall. The cheek piece defines a plurality of lengthwise stacked receptacles opening toward a proximal end of the cheek piece and an elongate hole having a distal and a proximal end spaced lengthwise and distal of the stacked receptacles. The stacked receptacles, the catch shaft, the elongate hole and the pivot shaft are configured so that with the pivot shaft received in the elongate hole and the pivot shaft at the distal end of the elongate hole, the catch shaft is received in one of the stacked receptacles and the cheek piece is prevented from pivoting about the pivot shaft.

Abstract: A collapsible stock for a firearm and a firearm therewith. The firearm uses an action mechanism to discharge a cartridge so that a bullet travels through a barrel have a length of between seven inches and twenty four inches. The collapsible stock assists the action mechanism in ejecting a spent cartridge and injecting a fresh cartridge into the action. The collapsible stock is a slidable butt member which engages a stock tube. Within the stock tube is a uniform spring capable of reliably operating for varying barrel lengths together with a buffer mechanism working with the spring.

Abstract: A modular cheek rest assembly for a gunstock. The major members of the assembly are a low level cheek rest, a high level cheek rest, a storage container, a shotgun shell holder and a magazine holder. The low level cheek rest is the principal member that has engagement structure adjacent the bottom ends of its side walls for detachably securing the low level cheek rest to the butt stock of a firearm. There are attachment structure on the outer surface of the side walls of the low level cheek rest for disengageably attaching the other members. There is the ability to attach these members on either the right or left side depending on the preference of the user. If the high level cheek rest is needed, it nests over the top of the low level cheek rest.

Abstract: A collapsible M16-type stock which includes a first portion coupled to the firearm buffer tube and a second portion abutting the user's shoulder, with a recoil mitigation mechanism disposed between the two portions, so as to mitigate the recoil caused by the firearm.

Abstract: A modular fore-end rail assembly for a firearm is disclosed. The assembly includes an upper handguard having forward and rearward ends. A dovetail rail extends between the forward and rearward ends. Opposing sidewalls extend outwardly and downwardly from the dovetail rail, respectively. The sidewalls terminate in mounting channels. The rearward end includes a first clamping member. A clamp is removably secured to the rearward end and cooperates with the first clamping member to engage a barrel nut of a firearm. The clamp has an exterior surface including a slidable locking pin movable between a locked position and an unlocked position. A lower handguard includes sidewalls that extend outwardly and upwardly. The sidewalls terminate in mating formations that are configured to be slidably received in the mounting channels. A lock aperture is provided at a rearward end of the lower handguard.

Abstract: The present invention is related to weapons systems. In particular, the present invention is directed to accessory attachment systems for rifles and small arms weapons that enable attached accessory devices to draw power from a central power source and communicate with the user and/or other devices. The present invention embodies firearm systems comprising at least one mounting rail comprising at least one power connection, at least one power source, at least one rail accessory comprising a rail grabber or mount, wherein the at least one rail accessory receives electrical power from the power source.

Abstract: A firearm grip, a firearm grip construction set and related methods are disclosed. An example firearm grip includes a grip portion, which includes a wall covering at least a portion of a magazine and a plurality of ribs. The firearm grip also ahs a first grip shell having a plurality of first lateral edges, second grip shell having a plurality of second lateral edges, and a grip back having a top edge and a bottom edge. With the example firearm grip, at least one of the first grip shell or the second grip shell is exchangeable. In addition, at least one of the first grip shell, the second grip shell or the grip back is coupled to the grip portion with an undercut tongue and groove connection.

Abstract: A bipod rifle support which may be incorporated into the stock of the rifle itself or which may be incorporated into a body member which is attachable to the forward end of the rifle stock. Support legs are normally stowed within the elongated bores with the same being removable therefrom and inserted into sockets or bores so that the support legs extend downwardly and outwardly from the stock for engagement with a supporting surface such as the ground or the like. The support legs have elastic cords secured thereto which maintain the support legs in their stowed position and in their rifle support position.

Abstract: In one embodiment, a handguard system with clamp device for use on a firearm. The firearm has a barrel, an operating member and a receiver. The barrel and operating member are joined to the receiver. The handguard system includes a barrel nut, a tubular handguard, a clamp device, and a low profile rail gas block. The barrel nut secures the barrel to the receiver and has an outer surface which lies inward of the operating member and engages the inner surface of the handguard. The handguard inner surface includes a groove for providing clearance to the operating member and gas block. The clamp device attaches to the handguard and includes an actuating screw and a spring loaded clamp pad which engages the barrel nut outer surface. The low profile rail gas block permits both interfacing accessories and rapid installation and removal of the handguard.