{HEAD ~ Release} of the cover strap causes {TAIL ~ movement} of the hinge by the spring to position the magazine in a position for facilitating one handed loading of the magazine into an automatic pistol by the user 
causes
{ HEAD ~ Release } of the cover strap causes { TAIL ~ movement } of the hinge by the spring to position the magazine in a position for facilitating one handed loading of the magazine into an automatic pistol by the user
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH