On the other hand I think the French uniformed CSRG (called Automatic Rifles at the time) is good and not previously done before in this attacking pose, he needs a second to act as a quick loader though, a set of late WW1 french Infantry weapons would certainly be welcome... a DB/VB rifle grenade team and a small portable pneumatic trench mortar(called howitzers at the time)like the 1915+ 60mm Brandt (early tripod and later lighter stand on a foot version existed) with compressed air supplied by a hand pump or bottle...

Heavier tripod Brandt Type A 1915, pic probably taken 1918.
http://www.douglas-self.com/MUSEUM/COMMS/pneuguns/brandt4.jpg