I've been browsing plenty of websites and have had a really really hard time trying to find a drop-in threaded barrel for my 9mm M&P 2.0 with the 5 inch barrel. I found plenty of replacements for the 4.25in barrel M&P's, but none for the 5in. I called plenty of gunsmithing places near me who all said I have to purchase a 5inch barrel and can't do barrel extensions. But I can't find those anywhere. I already have a threaded 4.25 inch barrel so now I'm thinking about getting a machining company like protolabs to make me an inch long barrel extension that I can screw on at the end of my 4.25 inch barrel so that it sticks out of the gun enough so that I can attach my obsidian 9 suppressor. Unless someone here would happen to know where I can find the barrel for my gun?