Armaspec AR15 GEN4 H2 Stealth Recoil Spring Buffer Kit SS/Black. To eliminate any potential failure points we changed the screw to a roll pin across the plastic end piece and the cap is machined on the rodm replaced the snap ring with a washer. Specifications for Armaspec AR15 GEN4 H2 Stealth Recoil Spring Buffer Kit: Manufacturer: Armaspec Color: Stainless/Black Gun Model: AR-15 Condition: New Country of Origin: USA Features of Armaspec AR15 GEN4 H2 Stealth Recoil Spring Buffer Kit Coming Soon Package Contents: Armaspec AR15 GEN4 H2 Stealth Recoil Spring Buffer Kit What firearm models does the manufacturer say Armaspec AR15 GEN4 H2 Stealth Recoil Spring Buffer Kit is compatible with? The manufacturer suggests that Armaspec AR15 GEN4 H2 Stealth Recoil Spring Buffer Kit is compatible with AR-15Armaspec ARM263-H2: AR15 GEN4 H2 Stealth Recoil Spring Buffer Kit SS/Black