The gun kinda looks like a gun from fallout, it works pretty good and shoots 6mm steel bbs at 700 fps!

Thanks yall ,to lncrease power I can either increase the volume between the preset and the valve or increase the pressure (for instance 9mm pcp rifle that shoots 200joules uses ~20ml at ~120 bars, mine is ~5ml at 60 bars), but both increase will lead to lower shot count and higher firing pressure. I...

Thanks for your help I actually made it cycle well by increasing the pressure of the air coming out of the preset. I now need to figure out how to prevent bbs from rolling out of the barrel, I m using an AEG magazine so there is spring pressure, the gun uses a blow forward valve to cycle the bbs. 20...

Here is my full auto qev pop off bb gun, it's shooting around 450 fps with 0.30g bbs and about 300 fps with steel 0.90g bbs. It is powered with a paintball bottle with a modfied preset to around 200 psi