Hogue's AR-15 Collapsible 6-Position Overmolded Stock uses technology that merges a durable polymer core with the soft comfort of rubber overmolding. This process creates a desirable collapsible stock that provides the ultimate in comfort along with weapon control. Hogue Overmolded buttstocks for the AR-15 platform are designed to retain the important lines and aesthetics of the rifle while also providing the enhanced performance of rubber overmolding. The overmolding process creates a durable, comfortable stock that will last you for many years to come, and it is beard friendly! This stock assembly kit includes a commercial diameter buffer tube, carbine buffer, buffer spring, end plate and castle nut.