Algodoo

pretty good

iam still learning to built a gun can u hep me make disconnector

For the Delayed Blowback type you show:

Pros: Good ejection

Cons: Bad ejection

Which one is correct?

Ah, forgot to remove that. It's double "1)". Of course "extraction" one is the right one.

One peculiar thing that I noticed in the gas operated mechanism. There is a moving block of some sort that slides forward along with the bullet as it travels through the barrel. I have never seen anything like that in a real gas operated rifle (my AR15 for example). What is that?

It is some sort of "simulation" of gas operation. Since gas operated rifle cycle because of a propellant gas crashing in the gas piston. There is no way you could use energy of a spring (imitation of a propellant in this case) to open the action and cycle the bolt. It's just a "duct tape" of gun operation.

Yeah, that's the same kind of problem that others have run into when making gas operated firearms.

Overall, I think you did a good job showing those three types of firearm operations. And I found that it's easier and clearer to understand how those mechanisms work when I slow down the simulation speed to 0.1.