Black River Manufacturing Benelli M4/SBE 3 7/8 Round Magazine Extension Kit Carbon Fiber

Black River Manufacturing Benelli M4/SBE 3 7/8 Round Magazine Extension Kit Carbon Fiber. It is extremely light with tough aircraft grade aluminium adapters on both the receiver and forend side of the shotgun. The magazine is available with regular stainless or black oxide stainless. This is a complete kit. The magazide tube kit comes with everything you need. WHATS INCLUDED: Carbon fiber magazine tube picatinny magazine tube clamp extended spring and follower. Specifications for Black River Man