Even if it is armed, why not? It was Germanys main trainsport aircraft. It's not that great of a plane but for realism purposes the game should have aleast the main aircraft and vehicles of all sides. They talk about realism well lets get real. 

General characteristics
 Crew: 3 (two pilots, radio operator)
 Capacity: 18 troops or 12 litter patients
 Length: 18.90 m (62 ft 0 in)
 Wingspan: 29.25 m (95 ft 10 in)
 Height: 4.5 m (14 ft 10 in)
 Wing area: 110.5 m² (1,190 ft²)
 Empty weight: 6,510 kg (14,325 lb)
 Loaded weight: 9,200 kg (20,270 lb)
 Max. takeoff weight: 10,990 kg (24,200 lb)
 Powerplant: 3 × BMW 132T radial engines, 533 kW (715 hp)[32] each 
Performance
 Maximum speed: 265 km/h (165 mph) at sea level
 Cruise speed: 211 km/h (132 mph)
 Range: 870 km (540 mi)
 Service ceiling: 5,490 m (18,000 ft)
 Rate of climb: 17 minutes to 3,050 m (10,000 ft) 
Armament
 Guns: * 1 × 13 mm (.51 in) MG 131 machine gun in a dorsal position
 2 × 7.92 mm (.312 in) MG 15 machine guns
 Bombs: up to 500 kilograms (1,100 lb) of bombs (some variants)