A friend of mine owns a Pre-Ban Bushy that has the Bushy Shorty Heavy Barrel with taper in the middle of the barrel (sorry I am ignorant and don't know what it is called, M4 barrel?). Anyway, I know he replaced the entire upper from the original which was the old A1 Carry Handle Upper the rifle came with new. I also know the upper he put on with current barrel is all Bushy brand.
Here are the question(s):
1. His accuracy is terrible. Even adjusting the sights all over the place and trying to hit a can at 20 feet! What problem could he have that we need to fix due to our ignorance?
2. Does Bushmaster offer gunsmithing services for its own rifles including maybe accurizing if shipped back? If so, is it an hourly or per item charge?
Any help would be greatly appreciated.