Made for Saiga 12, Chaos Extended Rail System (CERS) is manufactured to highest standards in the industry. Our MIL-STD-1913 rails are made from aircraft grade 6061 aluminum alloy. Rock solid with the top rail extending over 13" in length. Hard coat military specification MIL-A-8625 or Type III non-reflective black. Already tapped for sights to be mounted. Weight: 17 oz.