The US tech tree line has two planes that are the A26, the B-10, and the B-50. These planes sit at 5.0.
They are objectively ABYSMAL
They both have a low top speed of 350-ish MPH, very mid dual .50 cal turret guns. Worse than this, it has a bad turn rate, to the point the 6x nose M2’s are not great unless your opponent is slow and close. The P-61C-1 is at 4.0, has better guns, better top speed, and better maneuverability, how is this thing at 5.0?