This adapter and rear stock combination features an open design that is lightweight and offers a great line of sight for using iron sights or a rail mounted scope. Stock and adapter weigh 1.1lbs. Length with adapter is about 8". New grip block on the underside of the adapter for added strength to secure the grip. Adapter fits between the receiver and the grip, machined to fit around the receiver for added strength. We include a longer, full length grip bolt that fits with the stock grip. If you need a longer "short bolt" for an aftermarket grip, ask for one in the comments section at the end of your order, we will NOT supply both bolts. This part number includes polymer rear stock, stock adapter and 1 long grip bolt. Other items sold separately.