Griffin Armament Extra Power Buffer Spring AR-15 A2 +15percent Black Large. Our buffer springs offer excellent resistance to corrosion superior fatigue properties and exceptional rigidity and durability. Griffin Armament recommend the extra power buffer springs for firearms that are regularly run to oil scarce or dry conditions at high round counts. They are also recommended for firearms that are regularly running suppressors. Specifications for Griffin Armament Extra Power Buffer Spring: Manufacturer: Griffin Armament Color: Black Finish: Corrosion Resistant Fabric/Material: 17-7 Stainless Steel Gun Type: Rifle Condition: New Features of Griffin Armament Extra Power Buffer Spring Extra Power Buffer Springs offer a +15percent enhanced overall recoil performance Package Contents: Griffin Armament Extra Power Buffer Spring What firearm models does the manufacturer say Griffin Armament Extra Power Buffer Spring is compatible with? The manufacturer says that Griffin Armament Extra Power Buffer Spring is compatible with AR-15 AR-10 M4Griffin Armament GABSAR15A215: Extra Power Buffer Spring AR-15 A2 +15percent Black Large