Mesa Tactical Remington Model 870 SureShell Aluminum Carrier and Saddle Rail w/Mag Clamp 6-Shell 12 Gauge 20 in Black. The saddle rails offer a perfect solution for adding optical sights and SureShell shotshell carriers to Remington shotguns. Specifications for Mesa Tactical SureShell Aluminum Carrier and Saddle Rail: Manufacturer: Mesa Tactical Color: Black Gun Model: Remington Model 870 Gun Make: Remington Number of Rounds: 6 Fabric/Material: Aluminum Cartridge Type: 12 Gauge Shotshells Features of Mesa Tactical SureShell Aluminum Carrier and Saddle Rail The best and most durable weapon mounted shotshell carrier available Integrated Picatinny rail for optics or sights Innovative rubber friction retention system solidly holds shotshells in place Polymer yokes are lightweight injection-molded glass-filled nylon and feature two elastomer shell retention tubes Picatinny rails are machined from 6061-T6 aircraft quality aluminum and finished with Mil-spec Type III hard anodizing Mounts via trigger pin holes No gunsmithing is required Lifetime warranty Package Contents: Mesa Tactical SureShell Aluminum Carrier and Saddle Rail Hardware Instructions What firearm models does the manufacturer say Mesa Tactical SureShell Aluminum Carrier and Saddle Rail is compatible with? The manufacturer suggests that Mesa Tactical SureShell Aluminum Carrier and Saddle Rail is compatible with Remington Model 870 Remington Model 1100Mesa Tactical 92130: Remington Model 870 SureShell Aluminum Carrier and Saddle Rail w/Mag Clamp 6-Shell 12 Gauge 20 in Black