First, this is purely hypothetical, I have no issue with Bushmaster at all. I'm just looking for advice on another company.
If I bought a rifle from you that NEVER functioned correctly, was unreliable as hell, AND had been back to the shop 3 times to be repaired/upgraded with no noticeable improvement in performance, how would Bushmaster handle it? What if it appeared to be a design flaw, and not an individual rifle problem? Oh, and incidentally, this is supposed to be a state of the art weapon, and it cost upwards of a grand.