Talley rmr mounts are machined entirely from high grade 6000 series alloy and protected with a black anodized finish ensuring the craftsmanship of these direct rmr mounts last the lifetime of firearms.The stoeger rmr mounts are all designed and manufactured with precision to fit shotguns with the industry's tightest manufacturing tolerances.These rmr direct mounts provide a mounting platform for rmr foot print red dot optics eliminating the need for a picatinny rail or other adapters for specified firearms.Length: 1.78"Material: AluminumRings Included: No