Yes it does work... would I lie to you? Shells inspired by PrototypeN97 (YouTube). Finally got around to uploading this...I'm lazy. More stuff coming soon.
About this creation
This is (one) of the shells. Basically you pull the green thing back and load it up.
This is what I load it with. 2x1's first the the 3x1's
You can basically shoot whatever you can cram down the barrel. I can make little steel BBs work if you leand and follow with 3x3 peices
Mechanism, literally one peice
The shell loads/ejects here, slids in nice and easily
Loaded, that green rod sticking out means its armed. See that yellow peice? There is a bar that keeps the shell in place, but when fired the bar flew off. So I had to out the yellow peice there, this thing is that powerful.