[Masterjuggler98]

Turning the screw into a fladhead screw is probably your best bet. I do this to every screw that has a hex head because I always end up stripping them.

 

[Masterjuggler98]

If you have a dremel with a circular bit then you can start off the cut and use that slot with a flathead to get it out, then finish it off with the dremel or a saw. You could also use Light's suggested way of gluing a screwdriver to the screw to get it out, snap it off, then saw or dremel in the slot for a flathead.

 

[Masterjuggler98]

I used a small cutting wheel when I stripped my screws. It will only get a partial slot but enough to get it out with and finish it off once it's out.

 

[Masterjuggler98]

Then I guess you could try that gluing the screwdriver in trick. Try a glue that will hold it down but will snap somewhat easily like super glue. If that doesn't work, then you can borrow a dremel from a friend.

 

[Masterjuggler98]

If the problem is the bb stopper, you can get them for cheap at evike and (I think) ASGI. I wouldn't doubt it has wear on it because the sharp edge of the metal piston nozzle has to push past the plastic bb stopper to get a seal on the bucking. Over time that will cause a lot of wear.

 

[Masterjuggler98]

The bucking wouldn't cause it to double feed. My next best guess would be the mag. Open it up and clean and lube it. Just make sure to find a video on how to open it up because I heard it is a PITA to get back together without instructions, although I could be wrong.