I have a threaded 10/22 (not a takedown) and had the same problem. The threads are much longer than standard so you'll have to either shorten the barrel, get a custom muzzle device, or live with exposed threads. The takedown models with threads that I have seen still have open sights, which I think is ugly. Mine has a smooth barrel and looks much nicer. I took off the flash suppressor and added a custom thread cap.