[DUMBGRUNT]

How did this device work?

[FlingWingFlyer]

Recommendation for new TV Show. “America Has Gone Full Retard”.

[V_TWIN]

“The suspect is in custody and Abu says he hopes he’ll stay there.....”

In San Francisco??? Good luck.

Also the lack of description of the perp tells me everything I need to know.

[Tupelo]

Well, I am sure the San Francisco police can send the projectile to the Stassi Crime Lab for a ballistics analysis and they will be able to tell them which AR15 it came from

[irishjuggler]

When homemade wood-stick-and-balloon-trigger guns are outlawed, only outlaws will have homemade wood-stick-and-balloon-trigger guns.

[avenir]

“People who want to be rich fall into all sorts of temptations and traps.”

1 Timothy 6:9

[Angelino97]

[TribalPrincess2U]

If they tell us they’ll have to keeeeeeeeeeel us.

[Governor Dinwiddie]

Abu

[Leaning Right]

When Prohibition outlawed alcohol, people just smuggled it in. But some people just made their own.

The same thing would happen if the Left managed to outlaw all guns. Some people would just make their own. Unless of course the Left also managed to outlaw balloons as well.

[Do_Tar]

This is just a wild guess from the limited information. The victim seems to say a balloon with a "pen" sticking out. (Not "pin".)
Use a pen barrel with a bellows attached. We used to call them "Stomp Launchers".
Hit the bellows to send air pulse and launch projectile.

[gundog]

[Clay Moore]

Since it works, he could have taken his “gun” to a “buyback” and gotten $200 for it.

What stops someone from making a wheelbarrow of zipguns, leaving the spent round in it and cashing in at a “buyback?” Asking for a friend.

[Deplorable American1776]

Now, I heard of morons, but this Moron takes the cake. He got angry for not winning? Sorry, lotto is a game of chance, you have a better chance of giving that money to an illegal, then you are winning the lotto.