Abstract: Adjustable gas block assemblies for gas-operated firearms are disclosed along with modes of operation and methods of use. In certain aspects, gas blocks having a vent opening arranged to receive a vent plug are disclosed, the vent plug having an opening along a length thereof to vent high-pressure gas from the gas block. Kits containing multiple vent plugs and, in some instances, gas blocks are also disclosed.

Abstract: Trigger assemblies that preserve the integrity of the trigger sear surface when the trigger assembly enters a “half-cocked”, safety configuration are disclosed. In certain embodiments, a trigger safety engagement surface engages a hammer safety engagement surface in the safety configuration, preventing the hammer from rotating into contact with a firing pin. In some instances, the trigger sear surface is suspended within a safety recess (e.g., a notch) of the hammer and free of contact with the hammer when the trigger assembly is in the safety configuration.

Abstract: Handguard anchoring systems suitable for attaching a handguard to a firearm are disclosed, including systems having a fastener that extends into a barrel nut and compresses at least a portion of the handguard between the fastener and the barrel nut. Many embodiments include openings in the handguard and/or a plate that are oversized for the fastener such that the handguard may be rotated relative to the barrel nut when a portion of the fastener is positioned within the opening.

Abstract: Improvements to firearms that load cartridges from a magazine and/or a clip are disclosed. Specifically, improvements to slide assemblies and bolt assemblies to depress a cartridge in a magazine and/or a clip are provided. Such improvements include a sloped bottom-facing surface of the slide assembly and/or bolt assembly. The sloped bottom-facing surface is sloped along the length of the portion that contacts a cartridge in the magazine and/or clip when the slide assembly and/or bolt assembly reciprocates.

Abstract: Trigger assemblies that preserve the integrity of the trigger sear surface when the trigger assembly enters a “half-cocked”, safety configuration are disclosed. In certain embodiments, a trigger safety engagement surface engages a hammer safety engagement surface in the safety configuration, preventing the hammer from rotating into contact with a firing pin. In some instances, the trigger sear surface is suspended within a safety recess (e.g., a notch) of the hammer and free of contact with the hammer when the trigger assembly is in the safety configuration.

Abstract: Handguard anchoring systems suitable for attaching a handguard to a firearm are disclosed, including systems having a fastener that extends into a barrel nut and compresses at least a portion of the handguard between the fastener and the barrel nut. Many embodiments include openings in the handguard and/or a plate that are oversized for the fastener such that the handguard may be rotated relative to the barrel nut when a portion of the fastener is positioned within the opening.

Abstract: Trigger assemblies that preserve the integrity of the trigger sear surface when the trigger assembly enters a “half-cocked”, safety configuration are disclosed. In certain embodiments, a trigger safety engagement surface engages a hammer safety engagement surface in the safety configuration, preventing the hammer from rotating into contact with a firing pin. In some instances, the trigger sear surface is suspended within a safety recess (e.g., a notch) of the hammer and free of contact with the hammer when the trigger assembly is in the safety configuration.

Abstract: A method of modifying a .45 ACP pistol having a slide and a receiver defining a magazine well includes the steps of reducing the size of the magazine well and shortening the slide. The slide includes a breech face and a proximal end and the magazine well includes a front wall and spaced therefrom a rear wall. Reducing the size of the magazine well involves moving the rear wall closer to the front wall. Shortening the slide involves removing material from between the breech face and the proximal end. The shortening of the slide generally corresponds to the size reduction of the magazine well.

Abstract: A method of modifying a .45 ACP pistol having a slide and a receiver defining a magazine well includes the steps of reducing the size of the magazine well and shortening the slide. The slide includes a breech face and a proximal end and the magazine well includes a front wall and spaced therefrom a rear wall. Reducing the size of the magazine well involves moving the rear wall closer to the front wall. Shortening the slide involves removing material from between the breech face and the proximal end. The shortening of the slide generally corresponds to the size reduction of the magazine well.

Abstract: A mechanism for disabling a firearm is provided. The disablement mechanism includes a body positionable to block movement of the hammer spring assembly in order to prevent the hammer from being moved to its cocked position.

Abstract: A mechanism for disabling a firearm is provided. The disablement mechanism includes a body positionable to block movement of the hammer spring assembly in order to prevent the hammer from being moved to its cocked position.

Abstract: A mechanism for disabling a firearm is provided. The disablement mechanism includes a body positionable to contact a portion of the hammer spring assembly in order to prevent the hammer from being moved to its cocked position. The disablement mechanism is also positionable to prevent the hammer from firing a cartridge when the hammer is released from its cocked position.