Hi
mmm nasty ; steel or Lead? Looks like steel
I found some info on Mak barrel removal on the web somewhere. I'm sure I would have saved the URL somewhere so I'll have a search ASAP.
IIRC some were push fit others screw as they were varying it to try and stop the law makers saying it was too easy to upgrade to FB. Most international Mak chat is confused by people mixing CO2 and FB tips
If the CO2 bottle can come out, you may be able to remove the mag body and that might give you enough wiggle room to shift it (Long odds)
If it went togather it should come apart - Is it a case of the the famous Mak distorted balls problem; ie is your ball now a cam that could be rotated?
Temperature may help - not too hot (Co2 bang!) - not too cold (brittle metal casting), Dremmel it out?
I'll go and start looking and get back if I find anything.
TTFN