The LBE AR-308 Rifle Length Recoil Spring is engineered from high-quality 17-7 stainless steel for superior durability and consistent performance in your AR-308 rifle build.LBE AR-308 Recoil Spring Rifle LengthConstructed from premium 17-7 stainless steelDesigned for AR-308 rifle platform compatibilityTough and dependable for peak rifle performanceMade in the USA by LBE UnlimitedEssential for maintaining proper buffer system function this recoil spring ensures reliable cycling and optimal performance for your AR-308 rifle. LBE Unlimited is a trusted manufacturer of quality US-made firearm components and accessories.