Best Fun-Gun Ever. The Can Cannon - Mounts on AR-15 - GunsAmerica Digest
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Tennis Ball CANNON from Soup Cans | Today we're building a super simple tennis ball cannon that can pack a massive punch! We might've lost some tennis balls in the testing process...
CSV19 Pneumatic Antenna Launching System
Tennis Ball CANNON from Soup Cans - YouTube
How to Make a Tennis Ball Mortar: 12 Steps (with Pictures)