Guntec USA Heavy 4.4 oz Buffer and Spring Set H-2-SS-BUF+SPR Fabric/Material: Stainless Steel,

Was only installed and removed. Retails for $43.99. 

Product Info for Guntec USA  Heavy 4.4 oz Buffer and Spring Set

Flat Flex Spring Design Compresses And Has Adjustable Tension by trimming coils as needed. Improves Cycling Issues And Reduces Felt Recoil. Teflon Coated Flat Springimage