I fancied one, and bought one, it's over a joule so counts as an air gun, covered by the firearm act. Plastic bb, and co2 12g capsule. The gas gets screwed into the mag, which also holds the queue of bb's.

After a dozen or so shots, the slide stays 'shut' and gas starts to escape, as if the hammer is still stuck on the valve on the mag, so I quickly eject the mag, then pop it back in, re-cock the slide, and I'm away. Too many shots, things get too cold?

Problem 2. Sometimes the slide doesn't quite scoop up the next bb from the mag, and grinds to a halt, a cm from the close position. Anything I can grease, or something I can file?

Link to pics here: CLICK