US Patent 9523552 Anti-rotational quick disconnect mount for a firearm

An anti-rotational quick disconnect socket system for a firearm is disclosed. The system has an anti-rotational quick disconnect socket (QD socket) and a recess in a housing of a firearm. The recess is shaped to slidingly receive and seat the socket, and has a protrusion extending inwardly from the outer confines of the recess. The socket has a proximal end with a socket entry, a distal end, and a brace extending therebetween. The protrusion is engaged with the first brace to prevent rotation of the socket relative to the recess. The system has a gap between a proximal surface of the first protrusion and a distal surface of the socket entry.