A handguard system of a firearm includes a barrel nut, a handguard, and an adjustable barrel nut locking mechanism. The barrel nut is configured to secure a barrel to the firearm. The handguard includes a pathway, which extends transversely across the handguard. The pathway is configured to receive the adjustable barrel nut locking mechanism. The adjustable barrel nut locking mechanism includes a first wedge member, a second wedge member, and a biasing member. The biasing member is configured to connect the first wedge member to the second wedge member. The biasing member is further configured to incrementally bias the first wedge member toward the second wedge member when the biasing member is actuated. As a result, the first wedge member and the second wedge member are tightened about the barrel nut within the handguard.

A customizable firearm system includes a chassis. A barrel assembly is disposed in the chassis. The barrel assembly including a trunnion and a barrel nut assembly. The barrel nut assembly includes an outer barrel nut sleeve and an inner barrel nut sleeve receiving a barrel. The barrel nut assembly is removably disposed in the trunnion. A bolt carrier assembly is disposed in the chassis. The bolt carrier assembly includes a backplate assembly and a pair of guide rods. Each of the guide rods have a first end disposed in the backplate assembly, and a second end disposed in the trunnion. A bolt carrier slidably disposed on the guide rod.

A customizable firearm system includes a chassis. A barrel assembly is disposed in the chassis. The barrel assembly including a trunnion and a barrel nut assembly. The barrel nut assembly includes an outer barrel nut sleeve and an inner barrel nut sleeve receiving a barrel. The barrel nut assembly is removably disposed in the trunnion. A bolt carrier assembly is disposed in the chassis. The bolt carrier assembly includes a backplate assembly and a pair of guide rods. Each of the guide rods have a first end disposed in the backplate assembly, and a second end disposed in the trunnion. A bolt carrier slidably disposed on the guide rod.

The modular upper receiver assembly for firearms is an adapter allowing interchanging of barrels of different calibers to attach to an upper receiver assembly. The adapter assembly serves to provide a quick changeover coupling means for connecting an assortment of barrels of different calibers and lengths to the receiver. The coupling includes a barrel retaining bushing and adapter pair with threaded surfaces on the receiver for a threaded engagement, reinforced with threaded fastener compression for improved rigidity.

A firearm includes a quick-change barrel including: (a) at least two barrel-mounting features, each configured to selectively interact with a barrel-receipt feature of the firearm during mounting of the quick-change barrel to a mounting structure of the firearm, or (b) at least one barrel-mounting feature configured to selectively interact with at least two barrel-receipt features of the firearm during mounting of the quick-change barrel to a mounting structure of the firearm. The barrel is selectively mountable to the firearm in at least two orientations depending, per (a), upon which of the at least two barrel-mounting features interact with the barrel-receipt feature or, per (b), upon which of the at least two barrel-receipt fixtures interact with the barrel-mounting fixture.

A monolithic barrel for a weapon has an integral suppressor. The barrel and integral suppressor can be machined from a single piece of material, which can eliminate the need to attach separate components to the barrel. The monolithic barrel has a barrel bore for firing a projectile that produces discharge gas. To suppress the discharge, the barrel defines one or more baffles separating expansion chambers toward a distal end of the barrel. The barrel further defines one or more channels along the length of the barrel that provide extend flow paths for the discharge gas from the barrel's bore. Greater reductions in sound can be achieved relative to the overall barrel length due to the integral suppressor.

The disclosed Integrated Barrel and Muzzle Device System (IBMDS) is a firearm suppressor having an interchangeable projectile tube attached to a muzzle endcap and to a gas block endcap proximal a threaded muzzle of the firearm. The disclosure also includes a suppressor tube body configured to receive the muzzle endcap and the gas block front endcap located against a distal face of the threaded muzzle. The disclosure additionally includes a suppressor element received into the suppressor tube body proximal the muzzle endcap, wherein the suppressor element channels propellant gases from openings defined in the interchangeable projectile tube through an array of open cells.

A bolt action rifle having a receiver; a bolt in slidable communication within said receiver, having an elongated body and a bolt head at a first end, and an exposed bolt face with a primer recess cavity having a base with a forward-facing surface, the base having an aperture therein, where the aperture is circumscribed by the forward-facing surface for receiving a propellant charge having an extended primer cap, and a firing pin within the bolt and movable between a disengaged position wherein a firing pin head is receded within the aperture and an engaged position wherein the firing pin head extends beyond the forward-facing surface into the primer recess cavity.

A suppressor for a multi-barrel weapon system includes a barrel clamp about which the barrels rotate during discharge of the weapon, an adapter baffle engaging the barrel clamp and configured to receive the muzzles of the barrels, a plurality of extension baffles aligned with and arranged in a stack against the adaptor baffle, and an endcap baffle aligned with the extension baffles and engaging the final extension baffle in the stack. A plurality of projectile apertures in each baffle aligns with the muzzles to define a plurality of parallel bullet paths. The stacked baffles define a single continuous interior chamber in which the muzzles are enclosed and through which propellant gases comingle before venting out of the endcap baffle. A connecting rod extends through the barrel clamp and the baffle stack to compressively secure the baffle stack to the barrel clamp.

A suppressor for a multi-barrel weapon system includes a barrel clamp about which the barrels rotate during discharge of the weapon, an adapter baffle engaging the barrel clamp and configured to receive the muzzles of the barrels, a plurality of extension baffles aligned with and arranged in a stack against the adaptor baffle, and an endcap baffle aligned with the extension baffles and engaging the final extension baffle in the stack. A plurality of projectile apertures in each baffle aligns with the muzzles to define a plurality of parallel bullet paths. The stacked baffles define a single continuous interior chamber in which the muzzles are enclosed and through which propellant gases comingle before venting out of the endcap baffle. A connecting rod extends through the barrel clamp and the baffle stack to compressively secure the baffle stack to the barrel clamp.