okay after a while looking at dozens of different hammer valve configurations I have finally decided on a design I saw on youtube. Essentially it is a knock open valve system that works vey similarly to a caselman, but all the part should be able to fit within a 1 inch tube aside from a bolt. link: ...

Thanks for the recommendations. The only problem I am finding now is that I can't find any links to hammer valves available online and I would prefer buying one as I have no tools or time to machine a valve myself. Any suggestions?

How to make a diy airsoft more air efficent I've been looking into building an airsoft gun as my first project ever since mine , a 400 fps M14, broke. Im hoping to use a HPA portable gun-mounted resevoir to fire 0.4 gram bbs at 400-500fps and that the gun is semi-auto and uses a magazine(want to bu...