Since the static emplacement of the machine gun is explicitly mentioned, I was wondering if we could try for a mobile emplacement with a front shield. IIRC that's been tried in ww1 before it evolved into tanks.
Similar idea crossed my mind but I'm not sure. We might be better served with using that for a full defensive design - in that case a full-blown Panzernest, which is a little steel bunker on wheels armed with a single machinegun that could also be dug into the ground for additional stationary protection.
My question would be - do we posses any beasts of burden? I imagine "frontline" use would still be mostly people pushing/pulling but we could maybe make it so it has two pairs of wheels and there are little extensions at the back somewhat protecting any dudes brave enough to push it into position.
Slap in some basic ventillation for the inevitable combat gasses, maybe a stove for comfort if it gets cold and a periscope for the MG. If we get cocky/lucky a spotlight. But yeah, that's a design.
I'll post the gun later, am busy now.
EDIT: If that's too boring we can put it on legs like in Iron Harvest or something, if we make infantry armor to protect against the explosive bullets that they will probably revise at some point to be cheaper we could combine the knowledge to make exosuits or power armor or mechs.
I think i mentioned it somewhere but noble (of character) Administration Knights fighting against corrupt royalist (noble of birth) peons who resort to underhanded tactics is an idea I find infinitely amusing.