Suggest that if you are going to remove the barrel that you FIRST remove the screw which looks to be holding the tang. Then CAREFULLY and GENTLY tap the bands along the barrel towards the muzzle end, using a wedge of wood (rather than metal) so as not to scratch the barrel or dent the bands. Mark the band with something so that when you go to replace it, you put it on the right way round.They are usually slightly tapered to fit tight on the barrel. Barrel should then come off easily.
Stu
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