Cut from the Carolina shooting supply website about the quad rail
Made for the Vepr 12 shotgun.
The CSS Quad Rail System is manufactured to highest standards in the industry.
MIL-STD-1913 rails are made from aircraft grade 6061 aluminum alloy.
Hard coat military specification MIL-A-8625 or Type III non-reflective black.
Weight: 12 oz.
Does not fit any of the Saiga 12 Shotguns.