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This worked well for me. 1) Remove trigger assembly and bolt - basically gut the receiver. 2) Brace receiver in a suitable vise (preferably with non-marring surface) with the bottom of the receiver facing upwards. a. Since most non-marring surfaces are a polymer, situate the mag tube so that the mag tube and/or the area of the receiver where the tube threads into the receiver is not directly in contact with the polymeric non-marring surface. b. Picture attached with receiver in vise (orange polymeric non-marring surface) 3) Use a heat gun with a concentrating nozzle. Set heat gun at about 500˚F. Aim concentrating nozzle into mag tube and directly over the mag tube threads. Your target is where the follower is normally positioned. a. Picture attached with heat gun nozzle pointed inside mag tube – pointed at threaded area. 4) Apply heat and simultaneously start to unscrew the mag tube. a. This step is easier as a two-person operation. One person aims the heat gun, the other person begins to unscrew the mag tube. b. Person unscrewing must have a heat resistant mitts, preferably mitt that is grippy (silicone type works well) Going inside out is faster because it applies heat directly to the threads and save having to heat the end of the receiver and mag tube. Worked perfectly!