When I first started that particular build, I had it in mind to make it a 'pump action' repeater. A sliding forearm with a rod going up to the toggle. The toggle would stay closed until the slide action opened it. But I got hung up on how to lock the action closed when firing. I had thought of a button/bar that would engage the frame until pressed then it would unlock the slide. Pretty much like a pump shotgun.
But I got too engrossed in the rest of the build...It took on a life of its own...
It wouldn't have looked like a Luger carbine either, even from the side. Think of one of those old .22 Winchester pump action rifles. With a long bar going from the slide up to the toggle.
