I would like to suggest the Sicherungsfahrzeug UE (f) armed with an 7,92 mm MG 15 and 13mm Mg 131 in a fully rotating turret. Which would be like a mobile version (with far greater aiming angles) like the allready in game Mg 131 emplacement, while beeing usable, against a multitude of enemys, such as tanks, planes, infantry, AT guns.
History:
Sicherungsfahrzeug UE (f) meaning Security Vehicle UE (f) UE beeing the french captured Renault UE transport tankettes, captured by germany after the fall of france. Quite a lot of them were armored and armed with 1-3 Mgs of different construction, beeing Mg 15, Mg 34 and at least 1 with and Mg 131, these werent universally build and aparently not a single one matches the other. As the name suggests these were build for second line purpose to protect areas against sabotage and other partisans, who often didnt have proper AT guns, as such the light armor of 14,5mm which was enove to protect against 7,92mm S.m.K. Ammo was enove to create a good vehicle, small, light and armed as sayed befor with 1-3 Mgs prooven effective at its roll. Usually used to protect airfields and other points of interrest.
While the only 7,92mm Mg armed ones would be rather useless in game, the 13mm Mg 131 armed one, with a Mg 15 in the hull as well (when loaded with also S.m.K.H ammo, together with the Ap-I and I-T rounds would be usefull against low flying planes as well as some light armored vehicles, if not at least you could make fire support and detrack enemy tanks with high fire volume.
Interestingly somewhere this very Sicherungsfahrzeug UE (f) with Mg 131 is still in existence to this day.
Picture of the one i suggest:(Click to show)
The Guns:
1x 7,92 mm Mg 15 (lower hull) Free traverse +/-30°, -10° to +45° Elevation
1000 rpm
75 round drumms 825 rounds reserve
1x 13 mm Mg 131 (Turret) Free traverse 360°, inner mount additional +/-30°, -10° to +45° Elevation
900 rpm
1000 round belts of ~81kg (Unknown storage)
The Vehicle:
Renault UE
Armor: 8-14,5mm
Crew: 3
Dimensions: L / W / H 2,94m / 1,75 m / 1,24m
Weight: 3,3 ton
Engine: 38 Hp 4 Cylinder
Speed: 30-45 km/h
Source:
Mg 131 Manual
Handbuch der flugzeug Bordwaffenmunition 1936-1945
L.Dv.4000/10
Renault UE Manual
Beutepanzer der Wehrmacht, Ă–sterreich, Tschechoslovakai
Infanterie-Schlepper UE(f): Renault UE (Leo Lindberg)
Walter J. Spielberger: Beute-Kraftfahrzeuge und -Panzer der deutschen Wehrmacht