There is nothing wrong with PSA to begin with, I know a guy who buys stock AR's and builds them up for resale, He uses PSA for the biggest share of them, The ones I've handled and shot went Boom every time as well.
I have gas AR's and Piston AR's Both go Boom, I haven't been in a war and put 4000 rounds through them with out cleaning, But I shoot a lot more than your average guy, I clean and lube my rifles and I've never had a problem with them, And beyond 200yds They are very accurate the 15 is good for me out to 500yds the Sig 716 Ive only shot to 800 so far, That's as far as the range went, But once on target it was over and over again with hits.
I realize their are accurate Ak's and SKS but for the most part they are not in this ball park, Accurate to me is 1/2 " or less Accurate to some is 3" It all depends on what you like It is after all YOUR weapon!! ALL CAN FAIL