XTS 1913 Fixed Buffer Tube Adapter, Black The XTS 1913 Fixed Buffer Tube Adapter connects a compatible rear 1913 Picatinny mounting interface to a buffer-tube-style stock or brace arrangement. Its fixed design provides a non-folding adapter option for that mounting format. The adapter is made from 7075 aluminum and has a black exterior. XTS identifies it for compatible pistol-caliber carbines with a 1913 rear mounting system and for arrangements using a collapsible stock or brace. The rear interface is the key compatibility detail: a Picatinny accessory rail elsewhere on a firearm does not establish stock-adapter fit. Key Features Mounting interface: Rear 1913 Picatinny Adapter style: Fixed Construction: 7075 aluminum Specifications Brand: XTS Model: XTS-1913FIXA Color: Black Application: Compatible 1913-interface stock / brace arrangements Shop the XTS 1913 Fixed Buffer Tube Adapter, Black at BattleHawk Armory.