An interesting BBMG project with the pressure ramped up and correspondingly impressive rate of fire:

Here are some details of the valve, first with o-ring in place and then slide down to show the groove: http://i.imgur.com/Zx2I8Hyh.jpg http://i.imgur.com/17IwsIWh.jpg Also interesting to note the about of wear happening the two areas where the locking balls contact, on the firing pin as well as the ...

Some design studies for a 12 gauge air cartridge

Excellent work as always, as I've said privately the fact that you've made it work consistently would be admirable even if looked like a bunch of random parts thrown together, but you've also managed to make it neat and stylish, kudos! The trigger guard integrated in the pump handle is really a nice...

Very cool - I've often considered this same concept in a 1" -1.5" bore configuration (more shoulder rifle sized than anything) but using the piston valve hybrid design so I could use generic round ammo without needing to reload a burst disc every time (golf balls or similar lol). Any idea of the muz...

Whoa, thats pretty amazing work. Very nice. I love the compactness of the whole thing. It's very clean.

Believe me, you really don't want me to join.