Very cool. Thanks for the additional howler-shots...
The full auto mechanism looks promising. Although its only a single action system, so we have one shot per turn.
If we think bigger, i could imagine up to 4 or 6 of shorter levers.
But i guess then a central magazine feed would be nessessary...
and that means disconnecting magazin and hammer system.
Something like this.
Not very sophisticated but easier to draw, than to explain what i mean