This ability was mentioned to be implemented as a future modification in its dev blog in 2016, ten years ago.
The bomber dm buff makes it need more firepower to shoot down. It would be a great time to implement this feature in the P-61, as bomber interceptors are now in great demand.
In War Thunder, the American “flying tank” is a rank III aircraft with powerful frontal weaponry (four 20mm cannons and four 12.7 mm machine guns), a solid frame, protected fuel tanks, the ability to carry up to four 1,000 lb bombs, and a highly curious turret with four Browning 12.7 mm machine guns, capable of attacking targets all across its upper surfaces. Incidentally, this turret could also be locked to shoot forwards, so the pilot could control it as a frontal weapon. In War Thunder, we plan to introduce this function a little later in the form of a researched modification .
