Abstract: A method and apparatus for dampening vibration forces being transmitted from a vehicle to a firearm mount and firearm to permit substantially vibration free aiming and firing of the firearm from the moving vehicle. A support member supports a pliable membrane and permits flexing movement of a region of the membrane in response to vibration forces. A firearm mount is secured to a flexing region of the membrane. Vibration forces transmitted from the vehicle to the firearm mount are dampened by flexing of the membrane due to the mass of the firearm thereby permitting the firearm to remain stabilized for accurate aiming and firing.

Abstract: A cartridge gas port selector mechanism for a firearm barrel having a plurality of gas ports extending from the barrel bore and having a gas block with gas passages in communication with a gas tube. A selector valve member is movable within the gas block between an open condition permitting flow of cartridge gas from one or more ports of the firearm barrel to the cartridge gas passage and a closed condition blocking flow of cartridge gas from the barrel bore to the cartridge gas passage. A valve selector or actuator is connected with the valve member and is selectively moveable to position the valve member at the open condition or the closed condition to select the volume and timing of cartridge gas communication from the barrel bore to the gas energized autoloading mechanism of the firearm.

Abstract: A sight mount base having longitudinally spaced base sections defines an intermediate space or recess within which the downwardly facing Horus reticle adjustment knob of an inverted optical sighting device is received. The sight mount base may have independent, spaced base sections, each being releasably mounted to the accessory mount rail of the firearm or may be a unitary base structure machined to define an intermediate recess or receptacle within which the Horus reticle adjustment knob is received. The spaced base sections may be interconnected by a structural bridge so that the sight mount base is in the form of an integral structure. Inverted positioning of the optical sighting device eliminates the presence of upwardly projecting obstructions.

Abstract: A suppressor mechanism has an elongate tubular housing containing baffles and into which is assembled a suppressor mount body having spaced thread sections and spaced tapered gas seal surfaces. An adapter/muzzle brake member defines an internally threaded section that establishes threaded connection with the reduced diameter externally threaded section of a typical firearm barrel that is prepared for attachment of a suppressor thereto. The suppressor mount body and the muzzle brake/adapter member each define spaced threaded sections that establish threaded connection and promote enhanced structural integrity. The spaced internal tapered surfaces of the suppressor mount body and the spaced external tapered surfaces of the muzzle brake/adapter member establish spaced internal cartridge gas seals that prevent high pressure hot cartridge gas and gunpowder residue from coming into contact with and potentially fouling the thread connections of the suppressor mount body and the muzzle brake/adapter member.

Abstract: A cartridge magazine for firearms having internal lateral guide ridges of dimensions for establishing lateral guiding engagement with cartridges within the magazine chamber and having longitudinal internal guide ridges projecting inwardly from said side panels. The internal longitudinal guide ridges establish low friction essentially line contact with the uppermost cartridge and establish low friction forward charging movement of the uppermost cartridge from the cartridge magazine during firearm loading. The cartridge magazine is preferably formed from a single piece of sheet metal stock and is die folded and die formed to define external depressions and internal low friction cartridge guide ridges for lateral guiding of cartridge movement within the magazine and forward guiding movement of cartridges as they are dispensed from the magazine.

Abstract: A mounting base mechanism for releasably securing an accessory device to a mechanical structure having opposed oppositely angulated clamp surfaces. The mounting base mechanism defines a first clamp surface having clamping engagement with one of the angulated clamp surfaces. A clamp support structure projects laterally from the mounting base mechanism and provides support for a clamp actuating mechanism having a clamping plate. A retainer device supported by the clamp support structure is operative to move the clamping plate substantially linearly for clamping engagement of the clamp plate with the other of the oppositely angulated clamp surfaces. A keeper member prevents inadvertent separation of the retainer and clamping plate from the clamp support structure.

Abstract: A mounting base mechanism for releasably securing an accessory device to a mechanical structure having opposed oppositely angulated clamp surfaces. The mounting base mechanism defines a first clamp surface having clamping engagement with one of the angulated clamp surfaces. A clamp support structure projects laterally from the mounting base mechanism and provides support for a clamp actuating mechanism having a clamping plate. A retainer device supported by the clamp support structure is operative to move the clamping plate substantially linerally for clamping engagement of the clamp plate with the other of the oppositely angulated clamp surfaces. A keeper member prevents inadvertent separation of the retainer and clamping plate from the clamp support structure.

Abstract: A cheek riser mechanism has a mounting base or saddle that is adapted for mounting to a gun-stock and defines guide rail members. A movable cheek riser member has guide grooves that receive the guide rail members and is linearly movable along the length of the guide rails. Upon rearward movement of the charging handle of an AR15 type rifle the movable cheek riser can be engaged and moved rearwardly by the user's hand or by the charging handle so that it does not interfere with a cartridge charging operation. A riser spring is compressed during rearward movement of the cheek riser and returns the movable cheek riser to its use position upon release of the charging handle.

Abstract: A hand-guard and barrel nut clamping assembly for tactical firearms and other mechanical equipment that is subject to frequent or sustained vibration or shock, such as when a firearm is subjected to sustained rapid fire and/or the firearm is handled roughly. A small generally half-moon shaped anti-rotation clamping member is secured to a hand-guard support element or other suitable structure by socket head cap screws and is secured in frictional contact with components of the hand-guard mount and a barrel nut. The anti-rotation clamping member functions as a key to “tie” the barrel nut and hand-guard nut together, simultaneously preventing either one from rotating, and thus preventing inadvertent vibration or shock induced loosening of either the hand-guard retainer nut or the barrel nut. The anti-rotation clamping member is also keyed onto the front of the upper receiver by a slot into which a portion of the receiver is engaged.

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 pivot mount base is assembled to or removed from the sight mounting rail of a firearm by a lever actuated cam energized rail clamping mechanism. The pivot mount base supports and provides for rotational and linear movement of a pivot shaft. A pivot shaft locator pin extending transversely through the pivot shaft is adapted to be selectively received in position controlling relation by pairs of aligned shaft location receptacles defined by the pivot mount base. A sight support device is fixed to the pivot shaft and serves to retain a firearm sighting device. The sight support device and sighting device are moveable between an operative position where the sighting device can be used to sight the firearm on a target and an inoperative position where the sighting device is positioned laterally offset from its operative position.

Abstract: A throw-lever releasable mounting system for mounting a device in quick-release relation to a support member has a mounting base having a configuration fitting opposed angulated rail surfaces and having a locator key engaging a positioning slot of the rail. Each mounting base provides for mounting and stabilization of optics mounting rings. A locking platform projects from the mounting base and defines a locking opening having a circular hard metal insert therein that defines a receptacle receiving a resilient member and providing for location of the spline/spindle shaft of a rotatable locking plate. A locking plate of a throw-lever that is rotatable between locking and unlocking positions has angulated and curved cam surfaces for forcibly engaging correspondingly angulated surfaces of the rail to achieve cam energized precision locating and locking engagement with the rail.

Abstract: A bar stock feeder and support mechanism for an automated machining center having a control system and a method for operation thereof. A work positioning structure is removably mounted to a work support and positioning table of an automated machining center and has a bar feeder top plate. Mechanized machine controlled pneumatic bar stock chucks on the bar feeder top plate have bar stock gripping collets which are closed and opened by the control system of the automated machining center for selectively gripping the bar stock during machining and selectively releasing the bar stock to permit its movement by a bar puller which raises the bar stock to a programmed height. A control umbilical cable is connected with the control system of the automated machining center and has controlling connection with each of the bar stock chucks. During operation of the machining center machining is performed serially on each bar stock, thus enhancing the productivity of the machining center.

Abstract: A gun sight mount is provided that enables the accurate and secure positioning of an optical sighting device onto a weapon or other equipment. The mount includes a base and a front and rear ring assemblies. The base is attached at at least two points to the weapon or equipment. The separate front and rear ring assemblies capture the weapon or equipment. The ring assemblies are secured to the base, whereby a secure mounting is acheived.

Abstract: A generally flat add-on desk surface is provided with hooks and stop members so that the work surface can be attached to a tablet on a tablet arm chair. Hooks and fixed stop members engage side edges of the tablet to hold the added surface in position and a retractable stop member permits simple attachment and detachment. The surface is significantly larger than the surface of the original tablet and can be added for special purposes such as examinations and the like.