Bushmaster has been up and down throughout the last 10 years. I've got an older dissipator that shoots with any gun in the safe, on the other hand one of my brothers has a 20" (I believe XM) that has had all kinds of problems, from bad extractor (replaced) to ill fitting rear takedown pin/opening.
I'd just bypass and go with a sure shot. I get sick of recommending the same 3 or 4 "economical" winners, so I'll let someone else. I have enough "good" rifles, I'm only interested in the best from now on. . .