Aimtech's Shotgun Saddle Mounts is precision machined of metal with a black hard coat anodized finish. It has a standard dovetail style mounting rail on top which accommodates most Weaver style rings and electronic sights. This mount is for Remington 870 12 gauge shotgun.Aimtech mount systems shotgun mounts are the finest no-gunsmithing saddle style scope mounts available. Aimtech mounts were the first of their style and if "imitation is the most sincere form of flattery" then we should be downright embarrassed by all the copying our competitors have done, don't be fooled, buy American and buy precision machined metal, not plastic. If you do that, chances are you'll be buying Aimtech products already. The mounts have a standard dovetail style mounting rail on top which accommodates most Weaver style rings and electronic sights designed to clamp to a Weaver style or cross-slot base as well as a Picatinny in most cases. The mounts are all finished in a beautiful satin black. Features: No gunsmithing needed Installs in minutes Function is far superior to single sided "plate" mounts Eye pleasing satin finish that won't shine and scare game Chosen by the 2 largest sports optics companies in the world as the designs they wanted to put their name on