AA hopup screw holes messed up threads,

Hi there , this would be my first post on the forum.

I'm having a bit of a problem with one of my Action Army hop up chamber screw holes (the one to the front that is attached to the barrel and the block).

the threads are messed up and therefore the screw doesn't grip onto the hop up chamber.

This causes the outer barrel to be a bit loose, I just want to know if anybody has had a similar problem and if so how did they fix it.

any help would be appreciated.