Signallers are basically your average US army grunts but with extra gear in the way of signalling or alarming friendly forces in the area to any enemy actions spotted.
A. Flare Rifle
basically just a larger flaregun, its way of handling being just like a rifle's makes it more accurate and its larger bore barrel launches a larger payload. all of which make for a higher flying flare with a bigger bang and thus greatly increased visual range. it also make for a great rudimentary grenade launcher if you can get your hand on its rarer ammunition variants such as, high explosive and shape-charge. its average flares make good incendiaries though with its increased area of effect.
B. Colt revolver
C. Mauser C96
basic sidearm alternative. usually used by confederate army signallers.
D. Flare Pistol
an average flaregun, a completely optional part of the loadout or if for some reason they're equipped not with Flare Rifles.
basic short range army trumpet
F. Bomb/Gas siren
long range siren that can be heard for kilometers around. just hold it like a large lantern and turn the crank. most sets come with earplugs for the user.