Algodoo

This is the best gun I've seen here in a long time. the interruptor is awesome, nuff said.
I've always hated blowback, open bolt included, since getting regular recoil, decent ejection, and consistent bolt catching is hideous, even more so at the ~300 Hz that I (at least try to) use for my guns... Gas all the way. but this approach seems awesome

Thanks, Linkage, that's very kind of you, but it's really just a basic rip-off of the Thompson mechanism.

I've tinkered a lot with spring-powered bullets, but I found that rockets give a more consistent recoil impulse.