AimTech Rib Rider for the Remington 1100/1187/870
Manufactured from precision extruded and CNC machined aluminum alloy, these mounts grip the rib and wrap around or butt up to the rib pillars and provide you with the lowest possible profile. Most any electronic sight that attaches to a Weaver style or a Picatinny style base can work with these. The mounts are all finished in a beautiful black  Type II anodizing (typ.Mil. spec.A-8625).There are two styles available........The LOW RIDER style attaches as low on the rib as is mechanically possible. It is available as a pair of short or "double" bases (RRLD series) to allow a clamp to be attached to each base, or as a single longer base (RRLS series) for additional positioning options.