All it did was make cleaning the corrosive salts out of the internals a real pain. Just thought I'd prevent anyone else from trying similar and wasting money or in my case, time. At least the QD mount serves quite well as a FH so the work wasn't for nothing, and it didn't take more than an hour to take the barrel out, thread it, and put it back in. I used to think the gassing from a silenced AR15 was bad. This took that sort of thing to a whole new level.