The SP-A5 Spring and Buffer Kit includes everything you'll need to outfit your rifle with VLTOR s patented A5 Buffer System (aside from a compatible receiver extension tube).
The SP-A5 Spring and Buffer kit includes:
(1) A5H2 A5 Buffer (5.3oz)
(1) A5 Buffer Spring
(1) Vltor Lockplate
(1) Vltor Castle 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