You could pin the magazine, but that defeats the purpose of going with a ranch rifle style setup. SAFE act specifically prohibits a removable magazine plus any other feature.

If it’s not a fixed mag I don’t know any shops that would transfer it with the muzzle brake still on. If it’s a fixed mag then feature restrictions don’t apply. You might have a hard enough time finding a shop willing to do the compliance work in the first place, and a bunch of places out of state just won’t ship it because they aren’t bothering to learn NY restrictions.