Armament
xp-54
- 2 × 37 mm T-12/T-13 cannon 100 rds
- 2 × .50 cal M2 Browning machine guns 580 rds
XP-69
-
Guns:
- 4 × .50 in (12.7 mm) machine guns (1,280 rounds)
- 2 × 37 mm cannons (80 rounds)
The sole completed XP-58
- (proposed) 4 × 37 mm (1.5 in) M4 cannons or 1 × 75 mm (2.95 in) M5 cannon and 2 × .50 in (12.7 mm) Browning heavy machine guns in interchangeable nose
- (proposed) 4 × .50 in (12.7 mm) Browning heavy machine guns in two remotely controlled flexible turrets in the rear.