this is a great idea! how do you make them? as far as not quite so lethal self defense goes i think the wax slug is ultimate.
Well as far a less than lethal, I Use a home made pepper balls followed up by a few 3 gram Resin Bead ball, and if that still not enough their followed up by my home made pepper/marble mixed ball (pepper ball with a 9mm marble) followed by the MB68P Marble Ball which will make'em run for their life, If their still standing that is. With the right ammo paintball guns are great as the will hold 200 rounds.
this is a great idea! how do you make them?

That is the million dollar Question, Like I stated before it took me allot of time and expense to work out the bugs and details and I am hoping to raise enough to pay for a patent before my time runs out. Anyone want to invest?
To answer your question Please send $19.95 lol j/k
I went to the local hardware store picked me up a gauge meter, some glue, thread, marbles, rubber coating and a gas mask. Then spent the next 2 months working on what worked best. Size, Temp, thickness of rubber to apply, time periods between coats, ect. ect. Devils really in the details allot of trial and error and plenty of patience.
Michael