The ATI Mil-Spec Complete AR-10 308 Buffer Tube Assembly Kit for sale is perfect for your Bushmaster 308, DPMS 308 or your next lower parts build and fits most AR10.308 rifles. The LR-308 buffer tube kit includes MIL-SPEC 7075-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. The mil-spec buffer tube is manufactured from 7075-T6 aluminum and 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.