US Patent 10054393 Folding stock for a pistol or other firearm

A detachable folding stock includes folding body sections and a folding butt that can be folded and assumes its operational orientation in either the extended or the folded positions of the stock. The detachable folding stock is removably mountable to a pistol, which is mounted thereon by means of a locking pistol frame stock rim to a pistol grip lock well, for instance using a catching locker. The detachable folding stock includes the lock well, which is attached to the body and into which the pistol grip fits. The detachable folding stock can assume its operational position in a magazine change operation without interrupting the pistol grip lock well during a magazine change operation.