I looked at the website, and didnt see this particularly listed, but i swear i've seen folks reference adco doing this before.
i have a 16" pencil-ish barrel with FSB that i'd like to have cut down to 10.5 or 11.5 inches. to do this would require the cut, re-thread, and a re-crown i guess? does the gas port need to be altered as well? is this a service y'all offer?