SADLAK National Match Gas Piston Tin Coated Gold Small. The stainless material and heat-treating operations are both certified to assure that quality and all critical dimensions are individually inspected. Our precision pistons are made to the exact GI specifications with all critical dimensions individually inspected. The pistons have a highly polished surfaced using a non-contact electro-polishing method that maintains tolerance on the critical diameter and does not roundover the edges on the grooves. Specifications for SADLAK National Match Gas Piston: Manufacturer: SADLAK Fabric/Material: 420 Stainless Steel Gun Model: Springfield Armory M1A M14 Weight: 2 oz Features of SADLAK Gas Piston Sadlak Industries manufactures national match quality precision pistons using premium-grade heat-treated stainless steel with a highly polished surface. The stainless material and heat-treating operations are both certified to assure that quality and all critical dimensions are individually inspected. Package Contents: SADLAK National Match Gas Piston What firearm models does the manufacturer say SADLAK National Match Gas Piston is compatible with? The manufacturer says that SADLAK National Match Gas Piston is compatible with Springfield Armory M1A M14SADLAK 140032: National Match Gas Piston Tin Coated Gold Small