Does anyone know what font this is? Or one that's close and could be modified?
Thanks

Mobile Infantry  Suggeriti da NitneeGuy 
Gf Special 151  Suggeriti da tsatsaki 

It's a customized & altered version of Gf Special 151 - closest I can recommend.

I think the free Mobile Infantry font is a closer approximation.

I think that logo design was around long before either of those fonts.

Mobile Infantry is a good match, although I'd be willing to bet it was designed to match the logo,
rather than the other way around.