|While it was not my first choice for a 9mm conversion I bought it because it was in stock.
Turn out this upper is of decent quality, has a ramped bolt and works fine with the ProMag Magwell and the Promag 9mm magazines. I fired several mags in semi auto and rapid fire and shows no problems with brass ammo. Russian steel case ammo will cause problems. The primers are harder so they might not fire at all.
My setup now works flawlessly and the upper gives me a ton of option how to pimp the looks of it. |