Abstract

Provided is a handguard attachment mechanism for use with a firearm using a standard AR-pattern barrel nut having a substantially cylindrical portion with an axial length and an enlarged diameter radial flange at a forward end. The handguard includes a substantially tubular handguard with proximal and distal ends. The proximal end includes a longitudinal slot extending from the proximal end toward, but not to, the distal end. A pair of clamping lugs, one positioned on each side of the slot adjacent the proximal end, have means for adjustably drawing the clamping lugs together to narrow at least a portion of the longitudinal slot. A circumferentially incomplete barrel nut bushing is configured to fit on the barrel nut. When the barrel nut bushing is placed on the barrel nut and the proximal end of the handguard is placed over the barrel nut bushing, the clamping means adjustably draws the clamping lugs together, compressing the barrel nut bushing on the barrel nut, to releasably secure the handguard to the barrel nut.

IPC Classes  ?

• F41C 23/16 - Forestocks; Handgrips; Hand guards
• F41A 21/48 - Barrel mounting means, e.g. releasable mountings for replaceable barrels

Goods & Services

Component parts for pistols; Component parts for rifles; Firearm hand guards; Firearm attachments, namely, modular external rail systems for firearms; Firearms; Gun barrels; Muzzle brakes that screw onto a rifle barrel

Goods & Services

Muzzle brakes that screw onto a firearm barrel

Abstract

A passive safety for an AR platform firearm includes a sliding or pivoting rotating safety which is normally active to prevent trigger movement as would cause the firearm to discharge, and even when any active safety on the firearm is in a “fire” position. The passive safety is deactivated when an operator grips the firearm in a normal position to engage and pivot the trigger to discharge the firearm. Alternative embodiments are disclosed.

IPC Classes  ?

• F41A 17/22 - Grip or stock safeties, i.e. safeties disengaged by clasping the grip or stock acting on the trigger

Abstract

Disclosed is an upper receiver assembly for use with an AR15-type lower receiver. The upper receiver assembly includes a monolithic upper receiver and forearm housing. A barrel has a breech end, a muzzle end, a bore axis, and a barrel trunnion at the breech end having a lug for direct connection to the lower receiver using the pivot pin. It includes a bolt carrier assembly, having a longitudinal slot and rail engagement with the upper receiver housing on which the bolt carrier assembly slidably reciprocates, and a long-stroke gas-piston actuation system. A recoil spring assembly is housed within the monolithic upper receiver and forearm housing and extends coaxially with the longitudinal axis of the gas-piston actuation assembly. The barrel trunnion and gas block are configured for engagement with the upper receiver and forearm housing with longitudinal keyway features.

IPC Classes  ?

• F41C 23/16 - Forestocks; Handgrips; Hand guards
• F41A 3/66 - Breech housings or frames; Receivers
• F41A 5/26 - Arrangements or systems for bleeding the gas from the barrel
• F41A 5/28 - Adjustable systems
• F41A 15/14 - Cartridge extractors, i.e. devices for pulling cartridges or cartridge cases at least partially out of the cartridge chamber; Cartridge ejectors, i.e. devices for throwing the extracted cartridges or cartridge cases free of the gun for bolt-action guns the ejector being mounted on, or within, the bolt
• F41A 5/18 - Mechanisms or systems operated by propellant charge energy for automatically opening the lock gas-operated

Goods & Services

Parts of firearms, namely, upper receiver and barrel assemblies