Algodoo

Polish submachine gun PM-63 RAK (ręczny automat komadosów - Commando handheld automatic [weapon])

To shoot:
1: Pull the mag in.
2: Cock the weapon by moving the slide back (weapon fires from open bolt!)
3: Pull the trigger (it has only full auto mode)
4: If the mag is empty, remove it just by pulling it out.

This one is very reliable, but shoots pretty slow, if you want, you can increase sim speed.
In case of jamms cycle slide manually to eject spent case.
It supposed to have retractabel buttstock, but i didn't made it, so it has only retractable front grip.

Have phun!