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