I'd say either the D model
(1x 37 mm cannon (30 rounds), 2x .50 cal (200 rounds/gun) and 4x .30 cal (1,000 rounds/gun) machineguns. Provisions for a single 250-lb, 325-lb, or 500-lb bomb under the fuselage)
D-1 model
(replaced the 37mm with a 20mm hispano)
or the Q
(replaces the 2 wing mounted .30cals with single .50cals, for a total of 4x.50cal gunz two in wings two in cowling and it kept the 37mm)
or all of the above
whatever the case i would rly like to see this plane put into the game:aok