The "Baby Boomer", a new pint-sized air cannon

Finals are over for me, but for no other schools in the area. To alleviate boredom, I took my air cannons out for a spin today. 
 Here's the newest addition to my air cannon arsenal. It's my third creation, created from the guts of the first and the spare parts from the second. Compact enough to fit in a backpack, but retains 2/3rds the power of the large (second) cannon.
 Little improvements are everywhere. Instead of a friction fit, epoxy laden schraeder valve I used a metal fill valve. It threads on, has a rubber washer on the back, and is epoxied in to seal any possible leaks. It's rock solid, and I have no fears of accidentally breaking it.
The parts of the Baby Boomer, compared to the old, long one. 1/3rd the size, 2/3rds the power.
One night I went a little over-board with a sharpie. Not only does it have a sweet logo, but I also used the sharpie on:
 Most of the ammo! Each has a unique face, and a...
 Tail number. Tail numbers help you ensure that you have all your ammo at the end of the day. After these pictures, I also added my phone number. I've lost a few of them, but because of the phone number people seem to be returning them.
 Me gusta face.
 Some sort of... Vampire shark thing. This was the first face, inspired by the A-10 Warthog nose paint. Please forgive the fingerless gloves, it's cold.
Some sort of starry-eyed smiling guy. A word of caution, if you shoot sharpied footballs at a white wall, the faces will rub off on the wall. I have a couple faces stamped on my room's wall right now. Now to go find a magic eraser...

Air cannons are great, cheap fun. After an initial ~$50 investment, you can use them for more or less free! Cheaper than going out on the weekends, that's for sure. If you've got a good head on your shoulders, consider making your own!

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