Ok guys, Lost is at it again, but this time, with a coaxial piston design. Here's what I'm thinking. 3'x3" chamber, with a 3'x2" barrel running down the center, with a coaxial piston at the back. The valve to be used to open this coaxial piston will be a RainBird 1" sprinkler valve modified to pneum...

The only problem is...

I run an HK417, that I've completely overhauled the internals on...

6" groupings at 300ft.

I plan on keeping all my stuff shoulder fired

But I do have a fantastic idea for a milsim Rocket Launcher, as I am an Avid Airsofter.

It is worlds better. My teacher had me shoot my nerf pocketball out of it down at the football field... Stood ten yards behind the endzone, shot at a low angle through the uprights, and it landed at the other 70 yard line. So that's roughly 90 yards, 270 feet, on roughly 100-110 Psi. I'm pleased as ...

Well, I got fed up with it. I disassembled the whole valve, de-glued it, and went back at it with some two part epoxy I had lying around… Much better :D Absolutely zero leaks, but I did have to trim the spring down since it was way too compressed in the valve (due to the nipple), making the diaphrag...

I'll get on those pictures ;) I opted to go pneumatic, drilled the top out, filled the pilots in, and ran in my blow gun… Only one issue… it was leaking… profusely. So my cheap solution? HOT GLUE YAY. I ran a good bead along the inside edge, then tightened the nipple a little more. Then COATED the o...

Thanks! I appreciate it! I'll be putting her together today, so I'll report back when I'm done. Thanks for the warm welcome!

Hey guys, I've been making air cannons for awhile, from overpowered nerf shooters, to full size football launching monsters, but I've never dealt with Electronic Valves before, so here we go. I'm currently building a shoulder fire system, and wanted to run an electric valve, as opposed to a ball val...