Mesa Tactical SureShell Alum Carrier and Reflex Red Dot Mount Benelli M2 Tactical 4-Shell 12 Gauge Trijicon RMR 4.5 in Black. Carriers can also be installed pointed back toward the stock. The principle difference between one model of SureShell and another" aside from capacity" is the backing plate" which is designed to mount the carrier assembly on a particular model of shotgun. Side-mount SureShell shotshell carriers for Mossberg " Remington and Benelli M1 shotguns use the trigger group pin holes to secure the assemblies to the weapon; the Benelli M2 Tactical" Benelli M4/M1014" Benelli SuperNova Tactical and some Mossberg 500/590 versions take advantage of the factory-tapped rail mounting holes in the tops of these shotguns and include integrated Picatinny optics mounting rails; another version with an integrated rail is the saddle-mount design for Remington; SureShell Carriers for M4 SOPMOD stocks feature special hardware for attachment to these buttstocks; Adapter Mount SureShell shotshell carriers are designed to be attached to Mesa Tactical Telescoping Stock Adapter accessory mount points. Specifications for Mesa Tactical SureShell Alum Carrier and Reflex Red Dot Mount: Manufacturer: Mesa Tactical Color: Black Condition: New Features of Mesa Tactical SureShell: Aluminum 4-Shell Carrier Package Contents: Mesa Tactical SureShell includes necessary hardware Mesa Tactical 95190: SureShell Alum Carrier and Reflex Red Dot Mount Benelli M2 Tactical 4-Shell 12 Gauge Trijicon RMR 4.5 in Black