KAK Industry AR-15 Carbine Buffer Tube Kit Features The KAK Industry AR-15 Carbine Buffer Tube Kit is built to mil-spec dimensions ensuring compatibility with standard mil-spec stocks and components already on the market. Machined from 7075 aluminum the buffer tube offers the strength needed to handle the repeated cycling of a carbine length buffer system without flexing or wearing prematurely. The black military hard coat anodized finish adds a layer of durability against scratches and corrosion keeping the tube looking factory fresh after extended use. Six position adjustability on the buffer tube allows shooters to fine-tune length of pull once a compatible stock is installed. This kit arrives complete with everything needed to finish a lower build including the carbine buffer castle nut end plate and a chrome silicon spring designed to handle the heat and stress of repeated firing cycles. Chrome silicon springs resist fatigue better than standard music wire springs helping maintain consistent buffer spring tension over the long term. Because the kit accepts standard AR-15 buffers and springs it offers builders flexibility to swap components later if their needs change. The KAK Industry AR-15 Carbine Buffer Tube Kit is available for sale at GrabAGun for anyone finishing out a mil-spec AR-15 lower receiver. KAK Industry AR-15 Carbine Buffer Tube Kit Specifications Manufacturer: KAK Industry Model: AR-15 Carbine Buffer Tube Kit Type: Buffer Tube Complete Assembly Color: Black Finish: Anodized Material: 7075 Aluminum Positions: 6 Includes: Buffer Tube Carbine Buffer Castle Nut End Plate Chrome Silicon Spring Available At: GrabAGun