DIY airsoft grenade that isn't a wad of bb's duct taped to a firecracker?

 Okay, so here's what I'm thinking; an aluminum rod with holes in the sides for the bb's, the holes are a little larger than the bb's, and have a styrofoam chunk in each of them to hold the bb's in. Then a hole the size of the CO2 canister in the middle. I haven't worked out the timing mechanism yet, or even started to, but the firing mechanism would be a spring attached to a hammer with a spike on the end of it, pull the pin, hammer hits the co2 canister, boom. Any help/suggestions here?

I love the idea on paper, but in reality, it would take forever to load.
seabananers6 years ago
i made a OK one
make a small water bomb, put some BBs in it, and tight it up. 
smile3737 years ago
 you could use some sort of spring and ratchet mechanism, depending on how big you want it.