Folding firearms have a frame having a trigger assembly and defining a passage containing a bolt, a barrel assembly pivotally connected to the frame, the barrel assembly including a barrel element defining a barrel axis, the barrel element including a barrel, a plurality of suppressor baffles forward of the barrel, and having an interior space, the barrel assembly including a sleeve encompassing the barrel, the sleeve having an interior defining an expansion chamber in gas communication with the interior space of the barrel element, a front closure and a rear closure at respective ends of the sleeve to provide a gas seal enclosing the expansion chamber, and the sleeve being rotatable about the barrel axis. The sleeve may be movable between an operating condition in which the sight facility is in a first position and a stowage condition in which the sight facility is rotationally offset from the first position.

A fixture for use with AR15/M16 type firearms is provided herein. The fixture is made up of several parts that when used in conjunction with one another mitigate the transfer of torque from the barrel nut to the firearms receiver during barrel installation. The fixture affords the user a method and apparatus that holds the barrel in alignment with the firearm receiver and secures the barrel against rotational movement during installation of a barrel nut or similar device. The fixture may be configured to work with the legacy AR15/M16 type barrel nut, as well as other designs as disclosed herein.

A fixture for use with AR15/M16 type firearms is provided herein. The fixture is made up of several parts that when used in conjunction with one another mitigate the transfer of torque from the barrel nut to the firearms receiver during barrel installation. The fixture affords the user a method and apparatus that holds the barrel in alignment with the firearm receiver and secures the barrel against rotational movement during installation of a barrel nut or similar device. The fixture may be configured to work with the legacy AR15/M16 type barrel nut, as well as other designs as disclosed herein.

A modular handgun system comprises an elongated universal trigger frame having a pair of slide rails and an accessory rail. The trigger frame is adapted to have a trigger assembly mounted thereto. The system further comprises a grip frame having an elongated channel and a hand grip extending downwardly from the elongated channel. The trigger frame is removably mounted in the elongated channel of the grip frame. The accessory rail of the trigger frame is positioned forward of a forward end of the elongated channel of the grip frame so as to be exposed. The system further comprises a slide and barrel assembly slidably mounted on the slide rails of the trigger frame.

The invention relates to an upper receiver for a firearm, comprising a supporting part, which supports a barrel bushing for receiving a barrel, a guide for a longitudinally movable breech carrier, and an anchor for a sight. The guide for the breech carrier is formed on the underside of a rail block preferably made of metal which has the anchor for the sight on its upper side, and the supporting part is also preferably made of metal and mounted both to the barrel bushing and to the rail block via removable fasteners.

The invention relates to an upper receiver for a firearm, comprising a supporting part, which supports a barrel bushing for receiving a barrel, a guide for a longitudinally movable breech carrier, and an anchor for a sight. The guide for the breech carrier is formed on the underside of a rail block preferably made of metal which has the anchor for the sight on its upper side, and the supporting part is also preferably made of metal and mounted both to the barrel bushing and to the rail block via removable fasteners.

A rifle includes a magazine well, a barrel detachably coupled to the magazine well, and a suppressor detachably coupled to the barrel. The barrel includes a forward barrel portion on an end of the barrel opposite the magazine well. The forward barrel portion includes a muzzle locking mechanism. The suppressor is configured to be retractable.

An upper receiver assembly for a firearm having an upper receiver with an integral barrel nut, a handguard assembly and a barrel nut assembly with a barrel and lock nut is provided. The barrel is received by the upper receiver and is secured directly to the upper receiver using the lock nut. The upper receiver also includes an integral handguard mounting member to which the handguard assembly may be directly attached. The upper receiver assembly allows the user to attach both the barrel and handguard assemblies directly to the upper receiver, independently of one another.

An upper receiver assembly for a firearm having an upper receiver with an integral barrel nut, a handguard assembly and a barrel nut assembly with a barrel and lock nut is provided. The barrel is received by the upper receiver and is secured directly to the upper receiver using the lock nut. The upper receiver also includes an integral handguard mounting member to which the handguard assembly may be directly attached. The upper receiver assembly allows the user to attach both the barrel and handguard assemblies directly to the upper receiver, independently of one another.

A handguard assembly for installation on a firearm includes a handguard, an index block, a first fastener, and a second fastener. The handguard includes first and second clearance apertures and the index block includes first and second threaded apertures. The first and second fasteners extend through the respective first and second clearance apertures and threaded into the respective first and second threaded apertures. The first and second fasteners define respective first and second longitudinal axes that are non-parallel and non-collinear with each other. Tightening the first and second fasteners with respect to the index block secures the handguard to the index block and prevents movement of the handguard relative firearm.