Sniper AR-308 / LR-308 Recoil Buffer Spring Steel Metal. These AR buffer springs meet the standards of major manufacturers and are specifically designed to fit AR 308 or LR 308 applications. Over sizing of the buffer springs decreases reliability. The AR buffer springs are specifically made to fit as closely as possible to the original spring so that the two springs are in balance. This will lessen the time needed to manually balance the rifle. If you need help picking the right spring for your application check out our guide. Specifications for Sniper AR-308 / LR-308 Recoil Buffer Springs: Manufacturer: Sniper Color: Metal Fabric/Material: Steel Gun Type: Rifle Caliber: .308 Winchester Package Contents: Sniper AR-308 / LR-308 Recoil Buffer Spring Sniper ABTS07: AR-308 / LR-308 Recoil Buffer Spring Steel Metal