First, make sure its a common thread direction. Sigs for example are opposite direction. Once you are sure of that, you will have to apply a lot more heat than you might think is necessary along with a good penetrating oil like MOOVIT. With a very tight fitting wrench and the barrel in a vice give it sharp whacks to break the bond as opposed to just pulling very hard. Hopefully you won't have to cut it off.
Did this a few months ago...a torch is needed to break the locktite or rockset...once it smokes it is easy to come off.
Make sure you replace it with a muzzle device with the proper thread pitch M15x1 RH...Wolverine has a nice muzzle brake for them.
I gave up doing it myself, so I took it to my gunsmith. Surprisingly or not surprisingly he removed it, but took him a good 15 or so minutes. He didn't use the torch method though, but I suppose he have had a good grip on the barrel, plus he had the best fitting tools needed.
Thanks. How long you took for heating it?
I think I’m getting this one.
https://www.wolverinesupplies.com/P...T-AG-2-Chamber-Compensator-for-APC223-M15x1--




























