Are you looking for a sleek, lightweight, functional no nonsense, minimalistic stock for your next AR build, then look no further than this Battle Arms SaberTube Combo kit. The kit includes their Sabertube lightweight receiver extension/buffer tube, QD End Plate and the Lightweight Butt Stock(BAD-LBS). Precision CNC machined from billet aircraft grade aluminum. Designed so that there is no need to use a castle nut.Features: 6061 Aircraft Grade Aluminum (Buffer Tube) 7075-T6 Aircraft Grade Aluminum (Butt Stock) MilSpec Type III Class 2 Hard Anodized Black Finish Unique, Lightweight and Functional Dimpled Pattern Design Rifle Length Buffer Tube Mil-Spec Rifle Buffer and Buffer Spring Compatible Compatible with BAD-LBS only Lightweight design eliminated the need for Castle Nut Endplate with QD Mount Non-Rotating Quick Detach Sling Mount built-in on Stock Grade 5 Titanium Stock Screw Made in the USA