I've fired just over 4,000 rounds so far in my AR's this year, but I'll be hard pressed to make it to 5,000 before the year ends due to buying a house. Of those rounds 1k each was 9mm, 5.45x39, and 7.62x39. The rest were .308, .223, 300blk, 5.7, and .22lr. I'm on my 24th AR now, but 1/3 are...