WARPIG - World And Regional Paintball Information Guide
It's my understanding that this covers the pneumatic trigger system or electro-pneumatic trigger system that was called the hAir trigger WAY back in the day. The patent was applied for back in 2000.
I wonder if we're going to see any product made now, or if the market has passed the technology by. It's pretty hard to convince a ramping idiot to go back to only shooting one ball per mouseclick.