The Advanced Technology AR-15 military buffer tube assembly package fits most AR-15 and AR variants. It features a 6-position, hard-coat anodized 6061-T6 aluminum buffer tube with mil-spec thread and tube diameter. This assembly also comes with an AR-15 recoil plug, buffer spring, and a steel, military Grade E-coated castle nut and locking ring.
Specifications:

Type	Buffer Tube Package
Model	AR-15
Dimensions
Size	Mil-Spec
Material	Aluminum
Action
Trigger
Safety
Thread Pattern
Finish	Black Hardcoat Anodized
Bolt Type
Hand
Hammer Type
Max Capacity