Really fun, low recoil, and very accurate. - AR57 ULT 12in Barrel 5.7x28mm Upper Receiver Assembly

I purchased my AR-57 upper quite a while back but I just took it to the range today and thought I might as well review it. First off, the thing is just downright fun. 5.7 is a little more expensive per round but it's a pleasure shoot. I shot mine as it came from the factory and also suppressed, it's already fairly quiet but suppression made it a bit quieter which was nice. BTW, in the manual from the AR57 website it states that the muzzle device requires heating to remove- use a torch for about 30 to 45 seconds while you have the barrel in a vise and then use a stiff piece of metal (screw driver through the holes is fine) and REALLY give it some torque. The factory muzzle device is VERY VERY stuck on there. The barrel has a 1/2x28 thread so you can use standard 5.56 muzzle devices- I chose to use a Phantom QD system and it worked very well. The bore alignment with the QD adapter and suppressor mounted was perfect so I can say that the machine work is more than adequate. Overall I really enjoy this upper, I find it's a great value compared to some of the other options, and I can wholeheartedly recommend it.