The ATI AR-10 .308 Military Buffer Tube Assembly Kit for sale is perfect for your Bushmaster 308, DPMS LR308 or your next lower parts build fits most AR10.308 rifles. The LR-308 buffer tube kit includes MIL-SPEC Diameter 6061 T6 aluminum 6-position buffer tube, 308 carbine short buffer, 308 buffer spring, castle nut and end plate. This kit allows you to use a six position collapsible stock on your LR308 and carbine. Features Military Type III anodized finish. Black parkerized finished castle nut with staking notches and steel e-Coated end plate locking ring. ATI Limited Lifetime Warranty Made in the USA.