Mesa Tactical SureShell Polymer Carrier and Saddle Rail Remington Model 870 6-Shell 12 Gauge 5 in Black. The new SureShell Polymer Carrier also includes an innovative dual rubber friction system that reliably holds shotshells in place. The saddle rails feature Picatinny rails machined from aircraft grade 6061-T6 aluminum which are mil-spec hard anodized and provide an extremely durable non-glare matte finish. The basic saddle rail design provides a robust mounting platform suitable for mounting a variety of optical sights while a second version which is nearly identical to the basic version also includes a Mesa Tactical six shell SureShell polymer shotshell carrier mounted on the left side of the receiver. Both versions are manufactured in compliance with MIL-STD-1913 Picatinny specifications and no gunsmithing is required for installation. These new saddle rails offer a perfect solution for adding optical sights and SureShell shotshell carriers to Remington shotguns equipped with Mesa Tacticals new LEO telescoping stock and pistol grip system. The principle difference between one model of SureShell and another aside from capacity is the light-weight aluminum 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 Pictanny optics mounting rails; another version with an integrated rail is the saddle-mount design for Remington. Specifications for Mesa Tactical SureShell Polymer Carrier and Saddle Rail: Manufacturer: Mesa Tactical Color: Black Gun Model: Remington Model 11-87 Remington Model 1100 Gun Make: Remington Gauge: 12 Package Contents: Mesa Tactical SureShell Polymer Carrier and Saddle Rail includes necessary hardware What firearm models does the manufacturer say Mesa Tactical SureShell Polymer Carrier and Saddle Rail is compatible with? The manufacturer suggests that Mesa Tactical SureShell Polymer Carrier and Saddle Rail is compatible with Remington Model 1100 Remington Model 11-87Mesa Tactical 94830: SureShell Polymer Carrier and Saddle Rail Remington Model 870 6-Shell 12 Gauge 5 in Black