The Saiga Shotgun Gas Piston is one of the easiest ways to keep your shotgun compliant.  The piston is made of heat treated 1740 Stainless Steel, to withstand a lifetime of usage.  The part also comes marked with “USA” so there’s no doubt about where your part was made. This piston will work in all Saiga shotguns. (12, 20 & 410). Manufacturer may vary.