This is a short barrel shotgun, named the Ultimate Over/Under, manufactured in very limited numbers by Jonathan Arthur Ciener out of Cape Canaveral, Florida using a Remington Wingmaster 870 as the basis. This platform is designed for use underneath the barrel of AR-15/M16 rifles, specifically the M16A2 variation, affixing itself to the bayonet lug and either side of an elongated front receiver pin (not included). It is similar in function and concept to the Knight's Armament Company Masterkey, and was developed in 1989 as a competitor to it in an attempt to gain U.S. military interest. The main purpose in mind was for use in door breaching, utilizing the power of the shotgun to punch a door knob out, and eliminating the need for soldiers to carry an extra standard shotgun along with their standard issue rifle. Because the shotgun has no grip behind the trigger, when firing, the main rifle's magazine functions as a makeshift pistol grip. It is said these may have seen limited use with the Delta Force in Somalia. This is the ultimate rare item, and a must have, for any serious AR-15/M16 or modern U.S. Military collector! Provenance: The Al Walker Collection