12 gram how-to?
I want to build a basic anti-tank launcher, since I am getting into scenario soon. I have built several spud guns, both air and combustion varieties, so I feel like I am ready (in some ways) to take on the nerf launcher. I have read some threads and have some questions/ideas...
1. I would like to use an electronic valve (maybe sprinkler- I'd like to make a trigger setup)- any good ones? Am open to ball valves as well, though- any ideas are awesome!
2. For a 12 gram CO2 setup, what barrel length do I need, and are 6 or 8 inch reservoirs better?
3. What material should I use for the reservoir (steel pipe, aluminum, etc.)
4. Any links to some tutorials/plans?
If it helps, I'd like to build 2 of these suckers. I don't want to blow my bank account either. I built my most sophisticated air cannon for around $100, so can I expect a similar cost-to-build?