Because the vehicle collection uses their own ammo types for machine guns, the tracer function of Distant Misfires or Bullet Tracers don't function. The lack of a bullet tracer is a bit immersion breaking in my opinion, but the vehicles themselves look fantastic. The easiest solution in my non-technical opinion would be to use the vanilla bullet ammo for machine guns, as it seems that is what those mods override to do what they do.

Could you be more specific which vehicles exactly don't work with those mods? Because ALL vehicles of mine that have a machine gun use the vanilla ammo and ARE compatible. I just tested it

I'll have to do more thorough testing later, but from memory I think what turned me off is that all the custom ammunition didn't inherit the bullet trails or what not. That being said I may look into doing a simple mod to make the vehicles use vanilla equivalent ammo, but it'll take me awhile to figure out how to do all that.