An anti-rotation handguard system, including a barrel nut having a barrel nut aperture formed therethrough, along a longitudinal axis of the barrel nut, wherein the barrel nut includes a registration groove defined around the outer periphery of the barrel nut; and an anti-rotation ring having a barrel nut aperture formed therethrough, wherein the anti-rotation ring further comprises a first anti-rotation tab extending from the anti-rotation ring, wherein the first anti-rotation tab is formed so as to be received within a gas tube channel of a handguard, and wherein the anti-rotation ring further comprises a second anti-rotation tab extending from the anti-rotation ring, wherein the second anti-rotation tab is formed so as to be received within at least a portion of a compression/registration slot of the handguard.

An anti-rotation handguard system, including a barrel nut having a barrel nut aperture formed therethrough, along a longitudinal axis of the barrel nut, wherein the barrel nut includes a registration groove defined around the outer periphery of the barrel nut; and an anti-rotation ring having a barrel nut aperture formed therethrough, wherein the anti-rotation ring further comprises a first anti-rotation tab extending from the anti-rotation ring, wherein the first anti-rotation tab is formed so as to be received within a gas tube channel of a handguard, and wherein the anti-rotation ring further comprises a second anti-rotation tab extending from the anti-rotation ring, wherein the second anti-rotation tab is formed so as to be received within at least a portion of a compression/registration slot of the handguard.

An assembly for mounting a handguard to a firearm prevents longitudinal, axial, or radial misalignment relative to the axis of the firearm barrel by utilizing a biasing element disposed intermediate the barrel nut and the interior diameter of the handguard, a clamping element positioned opposite the biasing element about the perimeter of the barrel nut and having a first wedged surface, and a threaded wedge configured to co-act with the first wedged surface of the clamping element to directionally force the clamping element against the barrel nut in a manner that prevents canting of the handguard.

An assembly for mounting a handguard to a firearm utilizes a biasing element disposed intermediate the barrel nut and the interior end of the handguard and a clamping element also disposed intermediate the barrel nut and the interior end of the handguard but positioned opposite the biasing element about the perimeter of the barrel nut. One or both of the biasing element and clamping element have multiple surfaces which mimic portions of the exterior profile of the barrel nut to prevent any of longitudinal, axial, or radial misalignment of the handguard relative to the axis of the firearm barrel.

A bullpup stock assembly configured for housing a firearm assembly without the use of tools. The bullpup stock includes an upper housing configured to hingedly couple with a lower housing. A hinging means hingedly couples the upper and lower housings such that in a closed configuration the forward ends upper and lower housing are joined, and such that in an open configuration the upper and lower housing are not joined. A bullpup trigger is configured to communicate with a trigger of the firearm assembly by a trigger linkage assembly such that the bullpup trigger activates the firearm when depressed. A block assembly housed with the upper and lower housings is configured to house a firing assembly of the firearm and the trigger linkage assembly. At least one locking means for locking the upper and lower housings together when the forward ends of the upper and lower housing are joined.

A bullpup stock assembly configured for housing a firearm assembly without the use of tools. The bullpup stock includes an upper housing configured to hingedly couple with a lower housing. A hinging means hingedly couples the upper and lower housings such that in a closed configuration the forward ends upper and lower housing are joined, and such that in an open configuration the upper and lower housing are not joined. A bullpup trigger is configured to communicate with a trigger of the firearm assembly by a trigger linkage assembly such that the bullpup trigger activates the firearm when depressed. A block assembly housed with the upper and lower housings is configured to house a firing assembly of the firearm and the trigger linkage assembly. At least one locking means for locking the upper and lower housings together when the forward ends of the upper and lower housing are joined.

A laser sensor stimulator integrates laser units, an inertial measurement unit, a control unit, and ergonomic, modular design with GPS data feeds into a portable system that can be used to test energy sensors and warning devices and includes a user interface facilitates tracking and acquisition of items of interest by the laser sensor stimulator.

A laser sensor stimulator integrates laser units, an inertial measurement unit, a control unit, and ergonomic, modular design with GPS data feeds into a portable system that can be used to test energy sensors and warning devices and includes a user interface facilitates tracking and acquisition of items of interest by the laser sensor stimulator.

Embodiments include a stock for a crossbow or gun that includes two stock plates coupled to each other. The two stock plates define a gap. In an embodiment, the two stock plates are coupled to each other with one or more dampening elements. In an embodiment, the two stock plates diverge from each other towards one end of the stock, such that the gap widens towards the front end of the stock. In an embodiment, the stock is configured to shoot an arrow with the cock feather oriented vertically upwards or away from the stock. Other embodiments are also included herein.

Embodiments include a stock for a crossbow or gun that includes two stock plates coupled to each other. The two stock plates define a gap. In an embodiment, the two stock plates are coupled to each other with one or more dampening elements. In an embodiment, the two stock plates diverge from each other towards one end of the stock, such that the gap widens towards the front end of the stock. In an embodiment, the stock is configured to shoot an arrow with the cock feather oriented vertically upwards or away from the stock. Other embodiments are also included herein.