Bought a used pistol AR-15 from them,it's never worked properly. I brought it back hoping they could fix the problem, left it at the shop for a week and when I received it back(supposedly fixed) it was still doing the same thing.The younger gentleman claimed he had put 100 rounds though it flawlessly. I don't believe that considering I Still can't get it to fire more then one round without jamming.
I've tried 3 kinds of ammo Doesn't change anything,but when I use my other AR 15's upper it works flawlessly.
Update.
I bought another used gun from pistol parlor even though I told myself I wouldn't, this time it doesn't seem to have any problems