maybe not directly powering the gun , but the compressor, yes . but you might get bored with only eating beans and Brussel sprouts and drinking beer three meals a day ?If I could harness my body's methane I'd truly be air independent (with a constant source!).
Merry ChristmaHanuKwanza to all! Stay safe, shoot straight!
Centrifugal force? https://en.wikipedia.org/wiki/Centrifugal_gun
Centrifugal Machine Guns
What the hell is a centrifugal machine gun? In the plainest of terms its a gun that requires no propellant powder and a system which has sparked the imaginations of inventors and gun designers for over 200 years. Now we have footage of one in action.www.thefirearmblog.com
GsT
www.spinlaunch.com 
Then I'll bet you miss Mesilla Valley Kitchen too... Thanks for the links - that's pretty cool!They took the centrifugal machine gun tech and use it to launch rockets. About 35 miles north of where I live...
SpinLaunch Suborbital Accelerator
Located in SpacePort America, the SpinLaunch Suborbital Accelerate is the largest span vacuum chamber ever built, and is capable of launching test payloads to altitudes in excess of 300,000 feet.
