Have one that was welded on, took it off the other night. What a ##### drilled out where i thought the welds where but was wrong on one. Hammered away until I got fed up and went to bed. Got up at 3am and decided its coming off so out comes the 5 lb dead blow hammer and the largest punch I had to severly beat it into submision. Just hope I didnt damage the barrel. Sure looks better with the usgi flash hider.