This Stag Arms AR-15 Lower Receiver Parts Kit without Trigger Group includes all the parts you need to assemble a lower receiver into a lower half except for the buttstock assembly, hammer, trigger, disconnector, and their springs. Stag only uses top quality parts in these kits. This kit includes a right hand safety selector. Includes:A2 Pistol GripBolt CatchBolt Catch PlungerBolt Catch Roll PinBolt Catch SpringBuffer RetainerBuffer Retainer SpringLock WasherMagazine CatchMagazine Catch SpringMagazine Release ButtonPistol Grip ScrewPivot Pin2x Pivot/Takedown detents2x Pivot/Takedown detent springsSafety DetentSafety Detent SpringSemi-auto safety selectorTakedown pinTrigger Guard (Aluminum)Trigger Guard Roll Pin