Hello, I've been swinging by here for a fair number of years to see what's shakin' from time to time and working on some bbmg ideas that have been rattling in my gourd. I've recently signed on to present one of them here to see how it strikes you all. https://youtu.be/PtMkuVCu1pg I have more content...

excellent use of the blow-forward valve, I really should incorporate it in one of my designs some day. Lovely damage shots too, though is the power a little inconsistent? Some of the GBs just slam through, others appear to ricochet.

On a small scale it's not worth having a piloted exhaust valve, the hammer can open your main valve directly:

This one is just a fun experiment to answer a question that's been nagging me for over 30 years. Demonstration is at the end.

Here is one working:



Looks like it is basically the same concept as a NBB airsoft gun.

A double action trigger seals the chamber and then knocks open a valve poppet.

How does a Non blow back work? Is that like the trigger pulls nozzle loads bb Seats bb. And somehow blocks air input and releases chamber?. More or less, it depends on the model. On my Marui MK23 the trigger pushes a nozzle forward that strips a BB from the magazine and least it in the barrel, whil...

A good diagram of how it works

If you have the same air volume and the chamber is 1/3 the volume, the pressure will increase by 3x.

https://www.omnicalculator.com/physics/boyles-law

Higher pressure will always give better performance, you can use smaller chamber to get the same volume, and probably smaller valve, just that everything has to be rated for that pressure, that's why I stick to 150psi, materials are easy to get hold of.

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

Merry Christmas.

Merry Christmas and Happy Holidays everyone!



Enjoy!

Something I acquired recently, a "classic" Coksai/Kokusai CAR-15 airsoft rifle: 20230318_092349[1].jpg It works on the "bullet valve" principle that is relevant to the subject of this thread: bulletvalve.gif Some time in the future I'll do a detailed tear down to elucidate the operating system furth...

Rather interesting little creation:

A while back I started tweaking the design of a standard vortex block. I'm not sure what the specific design style would be called, but I'll just keep this simple and call it a 'block'. The typical design allows the bbs to continue spinning around the center hole until they 'find' the outlet. With 3...