The UTAS XTR-12 is the world's first AR-10 based semi-automatic shotgun the XTR-12 is the only one that doesn't only look like an AR design but also sports several technical similarities. The XTR-12 is a short-stroke piston-driven gas-operated shotgun and comes with a rotating bolt head and six locking lugs; the XTR-12 bolt is indeed an AR-10 type bolt beefed up in size for the 12-gauge shotshells.
Feeding through detachable magazines 12-gauge shotshells with a 76mm/3" ("Magnum") case, the UTAS XTR-12 semi-automatic shotgun comes with an 18.5" long 4140 stainless steel machined barrel with an M23x1.0 thread pitch; the bolt is manufactured of the same 4140 stainless steel, while the structure is manufactured out of lightweight aluminum alloy and magnesium, in order to keep the weight to acceptable levels.
The UTAS XTR-12 semi-automatic shotgun comes with an M4-type ergonomic pistol grip and a five-position collapsing polymer stock, and strips in two receivers just like an AR-15. The XTR-12 sports fully ambidextrous controls and several MIL-STD-1913 "Picatinny" rails for several types of Optics or tactical accessories.
The UTAS XTR-12 is the world's first AR-10 based semi-automatic shotgun the XTR-12 is the only one that doesn't only look like an AR design but also sports several technical similarities.
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