SAVE some money and buy this Mac-10 rear stock combination! This is the perfect set up if you want the feel and length of a 6 position adjustable AR stock and the strength of our new fixed stock bracket. It bolts to your gun using the existing holes from the wire stock and the stock latch plunger. It will not wiggle out during fire and has a tight precision fit. The addition of the AR stock will greatly improve accuracy and shot grouping as it provides a firm shoulder rest and helps to balance the weapon. Upgrade your MAC today and save some money! This part number for SMG only, does not fit Semi Auto guns. Installation instructions & Allen wrench included.