Hey Everyone new guy post. I'm not so new to airsoft bar this forum but anyway. My best bro is joining the forces soon and said I can have his Spring Barret for a couple of quid with the promise I finish his plan of converting it to gas blow back. Now I'm not sure what he had in mind but after seeing all the parts it looks like there might be enough room inside for some form of GBB system. Any hints or ideas that don't include throw it away.