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.

Presented are a firearm attachment and a method. An exemplary firearm attachment includes a gunstock comprising a cavity for attachment to a barrel, a handgrip port including a mount, a buttstock port, and a magazine port, the magazine port located on the gunstock to align with a magazine, the mount operable to slideably move and be affixed along a longitudinal axis of the gunstock. The firearm attachment further includes a handgrip, the handgrip removeably attached to the mount, the handgrip able to rotate relative to the gunstock to a plurality of locations, wherein the handgrip can be rotatably fixed at each one of the plurality of locations. The firearm attachment also includes a buttstock and a forearm grip.

Presented are a firearm attachment and a method. An exemplary firearm attachment includes a gunstock comprising a cavity for attachment to a barrel, a handgrip port including a mount, a buttstock port, and a magazine port, the magazine port located on the gunstock to align with a magazine, the mount operable to slideably move and be affixed along a longitudinal axis of the gunstock. The firearm attachment further includes a handgrip, the handgrip removeably attached to the mount, the handgrip able to rotate relative to the gunstock to a plurality of locations, wherein the handgrip can be rotatably fixed at each one of the plurality of locations. The firearm attachment also includes a buttstock and a forearm grip.

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.

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.

A rifle having a receiver alignment system includes an upper receiver and a lower receiver configured to engage with each other in an assembled configuration by aligning and pressing an exterior portion of the upper receiver into an interior portion of the lower receiver. A cavity is defined within the interior portion of the lower receiver configured to receive the upper receiver. A lug positioned on the upper receiver defines an alignment groove formed on a lower surface of the lug. A plunger pin is provided in a hole defined within the interior portion of the lower receiver. The plunger pin is configured to engage with the alignment groove and generate a spring-loaded tension when the upper receiver and the lower receiver are engaged in an assembled configuration.

Quick take-down firearms and methods of using quick-take down firearms. The quick-take down includes an upper receiver coupling and a barrel coupling. The quick take-down can be unlocked by sliding a sliding lock collar in a translational motion to an unlocked position to release locking elements from a locked configuration. In the unlocked position, a barrel and handguard may be installed onto and removed from the upper receiver of the firearm. Releasing the sliding lock collar returns it to a locked position, securing the barrel and handguard to the upper receiver.

Quick take-down firearms and methods of using quick-take down firearms. The quick-take down includes an upper receiver coupling and a barrel coupling. The quick take-down can be unlocked by sliding a sliding lock collar in a translational motion to an unlocked position to release locking elements from a locked configuration. In the unlocked position, a barrel and handguard may be installed onto and removed from the upper receiver of the firearm. Releasing the sliding lock collar returns it to a locked position, securing the barrel and handguard to the upper receiver.

A fore grip for a firearm houses a light source and power source. The light source is preferably a laser and the power source is preferably one or more batteries. A first switch is connected to a PCB and can be moved to respective positions that correspond to each of various operating conditions, such as continuously on, continuously off, and on when a second switch is activated.