The NBS Mil-Spec Lower Parts Kit Minus Fire Control Group and Pistol grip is everything you need and nothing you don’t. This kit, sourced from an OEM supplier of many name brand manufacturers, it is perfect for the builder who expects quality and will be choosing an upgraded grip and trigger group. It consists of high quality mil-spec or better parts. These are precision CNC machined parts, not MIM. Each kit includes: Safety Selector, Selector Spring and Detent Trigger Guard and Roll Pin Magazine Catch, Spring and Button Front Pivot Pin Rear Take Down Pin