I would have thought a strap wrench if you can get hold of one, take the extra bits off first.
Once you've broken any thread-lock it'd be easier, maybe with a tea towel.
I had grooves, cross cut into the feedneck of my blowback (Azodin Blitz) and wedged a butter knife in there, gave it a good twist and it popped free. Not sure there are grooves cut across the Axe/Mini feednecks...
*Edit* Just had a look at pics of it. If you can take the clamping bits off, soak a tea towel in hot water and hold it on the feedneck to warm it up a bit. Then pop a screwdriver in the hole where the screw from the clamp was and tap it with a hammer. The heat and the shock of the tapping should help knock the feedneck loose.