Considering the loading mechanism is a bolt action, I'm assuming the 6" is due to the required stroke of the bolt. If so, the air flow would probably be a straight path from the valve thru the bolt then impacting the rear of the projectile. Your only effect will be the pressure drop to fill the volu...

Are you looking to have a cartridge that is self contained and pressurized prior to chambering? Like RAP4 40MM Grenade?

Your chamber is 2". Your barrel is 2 1/2". You are flowing the air charge into a larger space removing a bit of back pressure. Couple that with a sluggish response from the valve and that can give your results. Remember that sprinkler valves are designed for water which has a lot more mass than air....

Grumpyoldman, is this the same or another t-shirt adventure?

I agree regarding the threaded rods. Unlike a bolt, which has a solid body blank between threads and head, giving it a bit more strength, threaded rod can stretch at every thread. Couple that with grade 18-8 (304SS) which is pretty good at corrosion resistance but a bit on the soft side, allowing mo...

Why can't these idiots shoot themselves properly BEFORE they start shooting others?

Great! Now help me explain to the Mrs. why the milk is now at room temperature.

I realize a refrigerant compressor would be quieter than a shop air compressor. But what is the PSI output on one of these conversions? I have heard the most potential is from a 110v window ac unit @250psi. Does anyone have theirs on a gage to know?

Hurry up every chance you get. But remember to stay within your design parameters.

Ok. I realize this is a very old thread, BUT, has this tube magazine gone anywhere? Solar, this one really intrigues me. I have seen the vertical magazine and revolver style of the Eclipse. But this is the closest to what I have been building. I gotta have more!

Nylon will wear well in the launcher. But it will still be quite a thump towards those small M4 screws holding the rear cap on. And yes, the softer the workpiece material...the sharper the tooling needs to be.

A barrel sealer will open faster in a smaller package, I don't see much merit in a chamber sealing Mauler. It would open slower or be bulkier and rely more heavily on the piston seals. True. I wouldn't want to "rely" on o-ring seals if I couldn't make them (EX. in my garage with a dremel). I'm a CN...

I really appreciate the steady progress on this project. Coming along nicely. And kudos to you for keeping to your original concepts. If keeping my boss happy (and wife and children and pets and etc) didn't take all of my time... oh the possibilities.

Hi Guys. I am trying to visualize the mauler valve variant. Does any one have a diagram of it? It sounds like what I am building, but I'm not sure if that's what you call it.

warhead052 - Insane? Feeding mechanism design or build? BTW my people here have me in a padded room already.