(494) A Dream Came True: Home Made Full Auto Crossbow! - YouTube This guy looks like he could be my brother. He comes up with all kinds of cool stuff. Fun to pass the time with.
You can buy full auto air guns. The biggest one I have seen is 35cal. You can also get it silenced. The 35cals spit out 80 to 90gr bullets at high subsonic. Zero federal regulations.
I gotta admit, watching this guy is a hoot! And, yes, I did laugh when he first demonstrated his full auto crossbow. LOL!
I look at his videos from time to time. The slingshot videos are more impressive but his ability to come up with this new stuff is amazing. Catapults? Rapid-fire slingshots?