Abstract: Trigger guard assemblies for firearms include a trigger guard movable between a closed positon; and an open position providing greater access to a trigger bow of the firearm. The trigger guard assemblies also include a post that engages the trigger guard, and is movable in relation to the trigger guard between a retracted position and an extended position. When in the retracted position, the post does not interfere with movement of the trigger guard between the open and closed positions. When in the extended position, the post interferes with movement of the trigger guard between the open and closed positions, and exerts a lateral force on the firearm to further secure the trigger guard to the firearm.

Abstract: The disclosure relates to mounts for knife sheaths. The mounts can be assembled in a first configuration in which the mounts can be strap-mounted; and a second configuration in which the mounts can be mounted on a waist belt. The mounts also permit the orientation of the sheath to be varied.

Abstract: Gas tube assembles are provided for mounting on a gas block of a gas-actuated firearm having an internal passage configured to receive propellant gas from a barrel of the firearm. The gas tube assemblies have a gas tube that defines a passage extending between a forward and a rearward end of the gas tube. The gas tube assemblies also have a mating portion secured to the gas tube. The mating portion has a flange that can be secured to the gas block so that the flange prevents linear and rotational movement of the gas tube in relation to the gas block.

Abstract: An anti-rattling biasing device for firearms includes a spring configured to exert a biasing force against an upper receiver and a lower receiver of the firearm. The biasing force urges the upper and lower receivers firmly into contact with the pins that couple the upper and lower receivers, inhibiting small back and forth movement between the upper and lower receivers and thereby reducing or eliminating rattling of the upper and lower receivers when assembled together.

Abstract: The disclosure relates to a mount for attaching an accessory to a firearm including: a body having at least one firearm rail mounting feature; at least one mounting cap removably securable to the body, the at least one mounting cap capable of forming a generally cylindrical passage with a portion of the body; and an auxiliary accessory mount removably securable to the body over the at least one mounting cap, wherein the auxiliary accessory mount includes: an accessory mounting surface configured to receive a firearm accessory; and a mounting feature extending generally perpendicular to the accessory mounting surface, the mounting feature being removably securable to the body.

Abstract: Linear trigger mechanisms for firearms include a trigger slide mounted on, and configured to move linearly in relation to a chassis; and a hammer. The trigger slide has a rolling element, such as a pin-mounted roller or a rolling pin, that engages a contact surface on the hammer and thereby restrains the hammer against its spring bias. When the user pulls the trigger to discharge the firearm, the trigger slide moves linearly, causing the rolling element to roll off of the contact surface and thereby release the hammer. The trigger mechanisms can be equipped with a drop safety that rotates in response to an impact between the firearm and the ground, so as to interfere with the movement of the trigger slide and prevent the release of the hammer.

Abstract: Trigger assemblies are provided for initiating the discharge of a firearm. The triggers assemblies include a first and a second lever mounted for rotation within a housing. The first lever is configured to be rotated by the user, and rotation of the first lever imparts rotation to the second lever to initiate the discharge of the firearm. The trigger assemblies have a safety mechanism that includes an interfering member configured to be positioned in proximity to the first and the second levers on a selective basis so that the interfering member simultaneously interferes with movement of both the first and the second levers, and thereby provides multiple points of interference that each prevent discharge of the firearm.

Abstract: Firearm handguard systems are disclosed, including rail alignment systems and anti-rotational firearm handguard systems. Also disclosed is a method of aligning a rail portion provided on an upper outer surface of a handguard using a handguard key that aligns the rail portion of the handguard with a rail portion of a firearm. Also disclosed is a firearm having a rail alignment system, and a handguard having a handguard key, wherein the handguard key is integrally formed with the handguard or is a modular handguard key configured to be removably attached to the handguard.

Abstract: The present disclosure provides a trigger assembly and related method for a firearm (e.g., an AR, SR-25, or M4 style rifle, or another type of firearm). The trigger assembly minimizes inadvertent discharge of the firearm by blocking the trigger from rearward pivoting until pressure is applied to the center portion of the trigger. The system and method employ a configuration wherein a camming surface is engaged with a machined portion of the lower receiver once the trigger assembly is connected to the lower receiver via a pivot that extends through the trigger assembly and at least a portion of the lower receiver.

Abstract: An M240 machine gun barrel assembly with a barrel with a muzzle end at the distal end of the barrel and a breach end at the proximal end of the barrel; a handle connector connecting the barrel to a handle assembly; and the handle assembly having a free end and a connected end, the connected end operably connected to the handle connector; the handle assembly operable between a first position with the free end of the handle assembly pointing proximally and a second position with the free end of the handle assembly pointing distally.

Abstract: A safety selector assembly for a firearm includes a cylinder sized and shaped to be rotatably received within a lower receiver; and a lever detachably coupled to the cylinder end and secured to the cylinder end by a threaded member. The threaded member is configured to engage the cylinder end, and to move between a first and a second position in relation to the cylinder end. The lever is configured to engage the threaded member when the threaded member is in the first position, and interfering contact between the threaded member and the lever causes the lever to be retained on the cylinder end. The lever can be removed from the cylinder end when the threaded member is in the second position.

Abstract: Trigger assemblies are provided for restraining a firing pin of a firearm on a selective basis. The triggers assemblies include a first and a second lever mounted for rotation within a housing. The first lever is configured to be rotated by the user, and rotation of the first lever imparts rotation to the second lever to initiate the discharge of the firearm. The trigger assemblies also include a safety mechanism having a safety lever that is movable between a first and a second angular position. The safety lever is configured to prevent movement of the first and second levers when the safety lever is in its first angular position, thereby preventing discharge of the firearm.