It should theoretically work if you can get a good seal but that bolt is going to be a missile and it is aiming right at you so if it brakes free you are going to have big problems. Fined out how a QEV works they are cheap and a much better solution, if you don't want to go down that road I suggest ...

I just bought one! It's the best thing ever.

The machining work on this is amazing not to mention the design that you have put into it all the while juggling home life, you are amazing.

I have made some very basic guns before that worn't really all that special so I was looking online and ran into my dream build, its a 30 Cal selective fire automatic air gun, if anyone wants the plans I will post a link or you could look them up online easily. Has anyone made one before or do you g...