Reap Weaponries Scy Bullpup Kit

What it is, however, is a kit to turn an AR-style receiver into a bullpup. You provide your own lower, upper (it can accommodate buffered uppers with a different stock piece), and grip, and it reduces your length of pull for you. I’m including a Sickle stock which goes right onto the rail on the back of bufferless receivers.

Nothing wrong with it, just decided to go a different direction.