A complete kit, ready-to-assemble on your Mossberg 590 Shockwave, greatly enhancing the usability of the firearm by adding a third point of contact.Features:Complete kit, ready-to-assembleFits 12 GA and 20 GAKit includes: SBM4 Pistol Stabilizing Brace, STDT pistol receiver extension, ERGO Flat Top SUREGRIP, ERGO Mossberg 590 adapter, Castle nut, Adjustable nylon strapATF compliant, US veteran designed and proudly made in the USA
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