Patent ID: 8800189

Claim:
In combination with a stock module, a modified buffer tube assembly for a modular gunstock for a firearm comprising: a. an assembly body, having an outer surface about a cylindrical tube, and an interior of the cylindrical tube defining a hollow buffer region, the outer surface further comprising a rail track, defined by uniform lateral grooves and likewise uniform rails located distally on the buffer tube assembly; b. an interface adapted to attach the assembly body to a firearm receiver, the buffer region having an opening through the interface; c. a uniform cheek plate, disposed towards an uppermost portion of the outer surface of the assembly body; and d. two longitudinal grooves, each disposed beneath and on either side of the uniform cheek plate in the outer surface of the assembly body, the longitudinal grooves providing a mounting interface for the stock module such that the uniform cheek plate of the assembly body remains entirely exposed after the stock module is slid along the longitudinal grooves of the buffer tube assembly wherein the rail track is configured to secure the stock module in a plurality of positions.