A complete kit, ready-to-assemble on your Remington Tac-14, greatly enhancing the usability of the firearm by adding a third point of contact. Features: Complete kit, ready-to-assemble. Fits 12 GA only. Kit includes: SBM4 Pistol Stabilizing Brace. STDT pistol receiver extension. ERGO Flat Top SUREGRIP. ERGO Remington 870 adapter. Castle nut. Adjustable nylon strap. ATF compliant, US veteran designed and proudly made in the USA.