On the 1201FP, the conventional end cap that retains the plastic forearm, extension shroud, and barrel is easily unscrewed. However, there is a very strong detent spring holding the actual mag tube cap in place. You'll want a small pin punch to depress the detent before you try to unscrew this end cap.
I haven't seen a source for aftermarket 1201FP barrels, but I did notice a customized 1201FP in the latest Guns & Weapons for Law Enforcement that had a screw-in choke tube visible. Unfortunately, it was just a filler photo and not the focus of the article.
|