Patent ID: 8276303
Filing Date: 2012-10-02
Classification: F41C,F41G,Y10T

Abstract:
1. A firearm comprising: a. a receiver with a barrel opening formed at a forward end of said receiver; b. a barrel inserted into the barrel opening of said receiver; c. a first attachment surface adjoining and coaxial with the barrel opening of said receiver; d. a barrel nut with an outer surface, a second attachment surface defining a central axis of said barrel nut, and a plurality of bores extending axially through said barrel nut at radial positions between the outer surface and the second attachment surface, the second attachment surface being engaged with said first attachment surface such that said barrel nut secures said barrel into the barrel opening of said receiver; e. a hand guard extending from a forward end to a rearward end between a peripheral surface and an inward surface, the inward surface being opened at the rearward and the forward ends to define a barrel space for receiving said barrel, said hand guard also including bores formed adjacent to the rearward opening of the barrel space; f. a sleeve with an inner surface adapted to engage the outer surface of said barrel nut, an outward surface adapted to engage a portion of the inward surface of said hand guard, and a first plurality of openings for receiving fasteners inserted through the bores of said barrel nut, said sleeve being interposed between said barrel nut and said hand guard; and g. a plurality of fasteners, each fastener inserted into one of the bores of said barrel nut and passing through one of the openings of said sleeve and extending into one of the bores of the hand guard, to fasten the barrel nut, sleeve, and hand guard to one another.