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
(1) A5 Buffer Spring
(1) Vltor Lockplate
(1) Vltor Castle Nut
***The SP-A5 kit is designed for the VLTOR A5 system and is only
compatible with other VLTOR A5 products. This SP-A5 spring kit requires
the use of an A5 receiver extension tube. The physical dimensions of A5
buffer components are different than that of standard carbine or rifle
buffer components. You cannot blend components from the different buffer
systems. Doing so may result in injury or damage to your firearm.