Yeah, there are a number of dedicated AK builders out there that have tons of experience dealing with out of center bores and suppressors.. The Arsenals aren't really known for this issue so much. You mostly hear about out of center bores on older surplus military rifles build on older tooling.

Trying to remember.. Don't the 107URs already have a 74 style threaded combo FSB/gasblock with just the extra barrel sticking out the end? If so many people have just cut the barrel of using the end of the gasblock combo as a guide and then have a smith put a crown on it and called it good.