Abstract: A firearm barrel is provided having a body defining an outer surface and a bore. The bore may define a rifling profile along at least a portion of a length of the barrel. The rifling profile may define a cross-sectional profile perpendicular to the length of the barrel at a location along the length of the barrel. The cross-sectional profile may include a plurality of arcuate portions and a plurality of linear portions. The cross-sectional profile may define a cross-sectional area defined by a Sporting Arms and Ammunition Manufacturers' Institute (SAAMI) standard rifling profile. Various embodiments may include firearms, assemblies, components, and methods associated with such firearms and firearm barrels.

Abstract: A remote weapon system (RWS) for an unmanned ground vehicle (UGV) includes a dedicated weapon, multi-axis gimbal and ammunition handling capabilities with all operations functioning remotely and wirelessly. The RWS comprises system-level and component-level safety features which preclude the weapon of the remote weapon system from being operable if removed from the remote weapon system.

Abstract: A firearm barrel is provided having a body defining an outer surface and a bore. The bore may define a rifling profile along at least a portion of a length of the barrel. The rifling profile may define a cross-sectional profile perpendicular to the length of the barrel at a location along the length of the barrel. The cross-sectional profile may include a plurality of arcuate portions and a plurality of linear portions. The cross-sectional profile may define a cross-sectional area defined by a Sporting Arms and Ammunition Manufacturers' Institute (SAAMI) standard rifling profile. Various embodiments may include firearms, assemblies, components, and methods associated with such firearms and firearm barrels.

Abstract: A remote weapon station (RWS) system for an unmanned ground vehicle (UGV) includes a dedicated weapon, multi-axis gimbal and ammunition handling capabilities with all operations functioning remotely and wirelessly. The RWS system is a gas powered, or self-powered, belt fed, rotating bolt lock weapon. In addition, the RWS is man-portable and air-droppable as the major subsystems may be latched together in the field without tooling or needing to make electrical connections.

Abstract: A weapon may include a translatable recoil mass and two translatable counterweights disposed on opposite sides of the recoil mass. Each counterweight may have a mass that is substantially one-half a mass of the recoil mass. A pair of racks may be fixed to respective ones of the counterweights and a second pair of racks may be fixed to opposites sides of the recoil mass. Pinions may engage the counterweight and recoil mass racks. A receiver may be fixed with respect to the recoil mass and the pair of counterweights. The directions of translation of the recoil mass are substantially opposite directions of translation of the two counterweights.