Well the bolt will come out but it takes a good impact driver and don't use any heat or you will melt the plastic parts and back up the back side with a block of wood to gain more force with the impact driver. Sorry Gamo USA does NOT sell any parts so your out of luck if the bolt breaks or is messed up beyond repair.
What is really funny is I have guys from Spain emailing me trying to get parts because Gamo will not even sell them to owners of Gamo rifles in Spain where the rifle is made.
Once it's out then you can grind off a bit of the bushing and then reinstall the bolt to tighten the slop..
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