{TAIL ~ an unmodified selected caliber handgun} having a barrel receiving {HEAD ~ cavity} with a mounting surface for receiving a live ammunition firing barrel 
{ TAIL ~ an unmodified selected caliber handgun } having a barrel receiving { HEAD ~ cavity } with a mounting surface for receiving a live ammunition firing barrel
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH