Check that all your guns on the Brit fighters are actually firing bullets

[notafinger!]

Can I ask where the proof is that red guns aren't working? Have you considered that the game engine is not going to render every single bullet impact? For example, when a lot of bombs go off at once the game stops rendering explosions in order not to cripple your FPS. I go into FMB and shoot at the water using my custom Spit or Hurri loadout and I see a two rows of splashes. I then change every gun to fire a different color tracer and see the same amount of splashes. Load all AP and shoot at a bomber and everybody inside is killed in the first burst.

This really seems like a phantom problem and spreading misinformation through the community with no evidence to back up the claim.