This is the MRA Renegade Mk II straight pull bolt action receiver. Comes with the bolt carrier, locking ring, gas seal ring, and upper lower receiver. This is a completely non-restricted way to keep using your AR15 parts. The Renegade takes your AR15 barrels, furniture, magazines, buffer spring assembly, and trigger group to create a novel 223 wylde or 300 blackout rifle that is non-restricted. No point wasting the perfectly good parts to an AR15 when you could still be shooting them. Text is best.