a post of me copied from another thread on this site:
I got mine not long ago. Zero problem so far. Accurate and quality/finish is fine for what you pay for. Ambi controls are a big plus for me as I am a lefty. The thing is anodized. The gun works very well and nothing beats it for the price.
But... As you know you have to expect some problems... The "clone" is really close the the real thing but some parts are still not perfectly up to the specs... Stock and ASAP sling plate got there with no issues. The tube is commercial size. Trigger guard upgrade was also with no issues. Barrel threading is true. Any muzzle device will fit no problem. 1/2x28TPI.
I also put in there an ambi charging handle I had. Works with no issue.
Here's the issues I got with mine:
-Replacing the grip. Had to remove just a little material on the grip to get the perfect fit. Nothing crazy just a little work.
-Replacing the handguard. Had to remove a little material on the rail system to make it fit in the hand guard plate. Norc one is a little smaller then spec. As you can see on many Youtube videos. As for getting it in the delta ring, I does fit but you will have a hard time to get it in there. Well at least with mine. Once it's in place and locked with the handguard screws it's rock solid. No shift while fireing.
I tryed another BCG in there and it will not fit properly due to the gas tube been over sized. It will not enter a normal spec BCG gas key. Well I might change the gas tube in the future so I can use any BCG. The bolt do fit perfectly in the barrel extension. other then the gas tube issue any BCG will fit the upper. The action is good.
But still a good deal. New models are doing the job just fine.
Cheers.
Enjoy your fine AR!!!!