I would like to build an airsoft light-mortar for
launching low power shells full of bb's or modified smoke canisters instead of firing a bunch of bb's shotgun-style like most home-made mortars.
here's a picture of what I would like to base it on:
M224 60mm Mortar
Some of the problems I think could be a problem include(in order from biggest concerns to smallest):
1. Designing a (reusable?)shell designed to detonate apon relatively low-impact and send bb's flying.
2. Constructing a decent bipod(weld some pipes together maybe? but what about a hinge?).
3. The propellant for the shell(should be ignited/released/whatever by landing on the firing pin(I'm considering using small c02 canister))
Any ideas, tips, opinions, etc are much appreciated.