Yes, mine seems to get better the more I shoot it. I ran about 70 old corroded high base 6's through it and had a few that didn't eject and one jam that locked everything up to where I could hardly get the mag out. So for right out of the box with less than stellar ammo I was optimistic. Then I ran 10rds of 3" #2's, had one jam and my shoulder had had enough. Took it home swapped out the stock with a magpul and JP grip, mounted a dot on it. Cleaned it real good, put in the light load gas piston. Went to the range today and it ran two boxes of Walmart Fed. bulk pack stuff at 1200 fps through it with no issues using both the 5 & 9 round mags. My 19 rounders and a muzzle break are on order. Let the fun begin!