This is the spring and buffer used in the Vltor A5 Recoil System. Kit comes complete with Rifle Length Spring, Special A5 Buffer, Receiver End Lock Plate and Nut.

Note: The A5 Spring and Buffer kit is designed to work only in the Vltor A5 Recoil System and must be used with an A5 or AR10 Short Rail receiver extension - attempting to use these parts in a regular carbine receiver extension will result in damage.