wyz2285 wrote:Thats why I said also to change the hammer spring to a weaker one.

Thank you for all your help man. I think at this point though I might just use a solenoid and run it off an Arduino microcontroller. But I do appreciate your help on figuring out the trigger system.

Alright. I already took that park out for my semi only trigger group. The issue is that the valve knocker doesn't release after I pull the trigger. It dumps all the gas.

remove the striker lock from the trigger group so it wouldn't keep the valve open even without the bolt cycling. Then perhaps a weaker hammer spring to further reduce the valve opening duration, since it no longer needs to cycle the bolt, just fire a BB instead. Not to sound like an idiot but what ...

I have some parts lying around and decided to make a tube fed bolt action rifle. I'm using WE closed bolt components and would like to know how to mod a gas release valve or valve knocker to release gas then close with no movement of the piston/cylinder components.

Another solution to your projectile falling into air supply is to have the air come through the bolt instead, but that raises other issues.

I have yet to find out myself. I was performing testing last night and my igniter began to fail. Less than 40% of my trigger pulls actually generate a spark. I am also having fueling issues. And as for boltsniper, I already took interest in his builds. In fact my next cannon will be partially inspir...

Progress has been made. I finished the cannon this afternoon. Its ready for its first shots. I have an 18 inch barrel of 1/2 inch PVC and a 6 inch 3/4 inner dia. combustion chamber sparked by Char-broil brand BBQ igniter. All of this concealed in a 1 1/4 inch PVC upper receiver and a lower receiver ...

It is what it is. The two layers are more for concealing the cannon within a streamlined design. I mentioned the other part because I like a bit of redundancy when it come to explosions near my face.

Just for clarification, I must make it clear. My plan is to have the 3/4 inch combustion chamber contained within a larger tube. 1 inch if possible, 1 1/4 most likely. This is more for aesthetics than anything, but also serves as extra protection in the event of a failure.

Thanks for the ratio. Got my dimensions down. Now as for PVC fittings, will the fittings for 3/4 inch PVC fit inside 1 inch PVC pipe?

So I'm building my first gun. I need some technical advice. The guns barrel is 16 in long, 1/2" bore. How long would a 3/4" combustion chamber need to be? Also with all the PVC fittings, will the 3/4 inch chamber fit in 1 inch tube?