Huge air consumption with an open bore is a un-fixable problem. What I DO hope to achieve is a more economical device that has a high rate of fire, completely reliable (as in NO stoppages), and uses it's air in the best possible ratio to BB delivery. A portable tank is then do-able, as long as it ca...

Oh, one more thing, as to the late nature of the post, I'm sorry but I just recently found this group and read all of the posts regarding BBMG, including this thread. I hope I haven't stepped on anyone's toes in the process, I'm just looking for an education. I've already warmed up my machine shop t...

Sorry, didn't mean to sound obtuse, I'm a fire captain/paramedic and hazmat technician with a background in (of course) chemistry. The constant pressure is achieved through the use of an inline regulator, but like all single stage regulators, it is impossible to achieve pressures higher than the sup...

CO2, like water converting to steam, boils at it's boiling point which is -78.5C. Like all gases stored as liquids under pressure, when they get cold due to rapid expansion (flash boiling), their pressure drops at an inverse curve causing radical pressure reduction. Flash boiling (and the subsequent...

I used a piece of 1/4" steel hydraulic brakeline tubing as the barrel in my tennis ball BBMG. The bore is about .182" ID, and it doesn't give much accuracy, but it keeps the misshapen BBs from jamming. The flanged end fits inside the gun nicely and provides a chamfered opening to the breech. It too ...