Sure looks like a badly stylized M16A1 the guy in the first one is carrying.
So Denver gets the taxpayers to pay some deadbeat artist to do lousy-perspective "art" that does the whole "America is Imperialism" shtick?
Not surprised.
Either I'm stone blind or that's definitely a stylized Kalashnikov. Look at the buttstock, cover plate, mag, and handguard. All clearly AK ish. M16 is kinda distinctive looking, you know? Uniform is a bit more generically "evil". Looks commie to me, but I'm biased. Still think my old drill sergeants would smack me upside the head for not plugging it a couple times.
Definitely strange artwork. Not bad quality, but I suppose it's subjective.