Well gents here is my take on this and it depends on what 37mm HTC has modeled the field guns on:
Russian 37mm (first produced 1939)
6,700 meters (effective vertical) or 4.3 miles or 7327 yards.
3,000 meters (maximum vertical) or 1.86 miles or 3280 yards
9,500 meters (maximum horizontal) or 5.9 miles or 10389 yards
German Flak 43 (37mm) produced from 1943-1945 and was the best version of all german 37mm anti aircraft guns.
4,200 meters (max. effective ceiling) or 2.6 miles or 4593 yards
6,585 meters (max. ground range) or 4.2 miles or 7,520 yards
US 37mm
1371 meter (sective Slant Range) or 0.85 miles or 1,500 yards
3200 meters (Maximum Horizontal Range) or 1.98 miles or 3,500 yards
3200 meters (Maximum Vertical Range) or 1.98 miles or 3,500 yards
2286 meters (Maximum Effective Fire Control Altitude) or 1.42 miles or 2,500 feet
So with that said yes it is possible to hit an aircraft at 10k with a lucky shot. In the game it appears that it is the Flak 43 that is modeled. What do you guys say?
BigKev