Brownells BRN-9 Upper Receiver 9mm Luger Blowback Black

At last we have a BRNA(R) upper for pistol-caliber AR fans! The BRN-9 is a complete, dedicated upper receiver assembly chambered in 9mm Luger (9x19mm, 9mm Parabellum). In common with our BRN-180A(R) series, the BRN-9's blowback operating system is entirely self-contained. It does not use the AR-15 recoil buffer system, so it does not need a receiver extension, aka "buffer tube." It readily functions with a folding stock as an SBR (all NFA rules apply), and as a pistol it doesn't need the stubby buffer tube common to AR pistols. How does it work? The BRN-9's bolt is connected to a weight above it that reciprocates inside the receiver and works with the internal Mfg: Brownells