A few receivers have sold and pictures of builds are beginning to come in. I built one for myself (number 7) and put my M&P upper on it. Another friend of mine build one for his son to shoot and he put a Huldra Arms piston upper on it. This one is just too badass not to share!! A friend of mine who's an armorer in the Navy bought a stripped lower and threw this together using "spare parts". It's SBRed and suppressed.