Reviews & Ratings for AR57 ULT 12in Barrel 5.7x28mm Upper Receiver Assembly — 8 reviews — Page 1

I purchased this out of curiosity. Ammo prices have come down to $.40/round. Hopefully, they will drop to a more reasonable $.20/round based on their actual cost to manufacture. The upper had a very stiff action at first. I disassembled it, cleaned it up and regressed/lubed it. After repeated cycling, dry firing, and actual range trips, it is operating a lot smoother. Still not as smooth as an AR-15 action though. I paired this with a polymer lower and 3 lbs trigger with no uptake. This makes for a super light and fast shooting gun. Having 50 rounds onboard makes it a great truck gun option that can reach out and touch things at 150m. I've had one malfunction that was probably the ammo. I was firing Fiocchi rounds and it pushed the nose of the round back into the case during loading. I had to pull the magazine to extract the round. Other than that, this thing is a flat shooting beast that can pepper targets in the A zone at distance.

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.

not happy - the product picture clearly shows a magazine - yet none ship with the upper. if you dont include it - the show an EFFN picture without a mag or make it very clear the upper doesnt include it. i checked other stores and they show a mag and include a mag in the offer. this essentially means the price is really $50 higher than advertised.

I was excited for this, neat concept but is just ok and the muzzle device will not come off(wanted to try it supressed)

Unfortunately i took a chance buying the demo, it being a demo optics Planet say i can not return it. This upper was a complete dud it do not function everything i pull the trigger it jus click. I tried different mags different lowers still dont function. Wait of money do bot buy a demo

Great product haven't tried it out. Down side doesn't ship with magazine. This company very anti high capacity magazines. Should have been shipped with at least a 10 round magazine. Now have to wait till i order the 50 round magazine. The magazine is the only reason i give it 2 stars