I mean the US doesn't have paramilitaries. We have literally millions of people in the National Guard. I do agree that ATF FBI etc might count, but then you'd have to include China's massive internal security army, which is bigger than the PLA (and for which the CCP used the Falun Gong - as annoying as those fuckers and their Epoch Times shit is these days - as a complete scapegoat to justify building a millions-strong internal army).

we have militias, which are, uh...much different. I'm sure they would love to be paramilitaries, but they're not.

now cops on the other hand, I would say the distinction is they see themselves as paramilitaries and the military by and large does not see them that way. this may be changing as cops become more and more synonymous with one political party (hey, kind of like China!)