Ultimate Arms Gear Tactical Weaver - Picatinny Rail Mounted Saiga 12 Gauge 5 Round Shotgun Stock Shot Shell Shotshell Ammo Carrier Holder Provides Convenient Access To 5 Additional 12 Gauge Shells For A Tremendous Tactical Advantage No Gunsmithing Required - Quickly & Securely Mounts And Dismounts On A Standard 7/8" Weaver Picatinny Accessory Rail Constructed Of Injected Military Grade Reinforced Polymer Innovative Push Button Release