A gunsmith should be able to do gun smithing things with minimal issues.
I emailed Remington about chambering a rifle in a not available at this time caliber, and about installing iron sights on it. They have a dwindling number of repair centers. Its not good days for Remington, looking at the current list I have personally been in 2 that no longer appear on that list.
Anyway they have 2 authorized service centers in Michigan, but they feel only 1 is capable of removing a rifle barrel, or rechambering, or even installing iron sights.
Is this become the new standard of the day?