The VLTOR SP-A5 Spring and Buffer Kit includes everything you’ll need to outfit your rifle with VLTOR’s patented A5 Buffer System. Pair this kit with a compatible A5 receiver extension to complete your install. The SP-A5 Spring and Buffer kit includes (1) “A5H2” A5 Buffer (5.33 oz) (1) A5 Buffer Spring (1) VLTOR Lock plate (end plate) (1) VLTOR Castle Nut The 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.
