Patent attributes
A hybrid firearm receiver includes a receiver body having a first end, a second end opposite the first end, a substantially planar bottom surface extending from the first end to the second end and transitioning to two upwardly extending opposing sidewalls, and a top end, the receiver body extending along a longitudinal axis from the first end to the second end. The first end is integrally formed with the receiver body and includes a first outer face and a rail interface that facilitates receiving a clamping mount of a gunstock between side edges of the rail interface and the first outer face. The rail interface has a plurality of flats disposed along a first plane that is transverse and non-perpendicular to the axis. The top end, the two opposing sidewall, and the first end form trough extending transverse to the axis.