Customers are always asking which side shell holder will work with the Black Aces Tactical RB7M Mossberg 500/590(A1) rail, and until now the answer was none of them. We are very proud to announce the introduction of the Black Aces Tactical 5 shot side shell holder. This shell holder features an ATI 5 shot grabber, a custom Black Aces Tactical back plate, and all the hardware needed to work with your quad rail.
Simply use the back plate in place of the port side ABS spacer, and remove/replace the OEM low profile receiver screw with the hardware provided in the kit. It is just that easy. Lightweight, and ergonomic, the Black Aces Tactical side shell holder is the natural addition to any RB7M.
Mossberg 500 Side Shell Holder