ARX C4 Unlock?

So, i took a look at C4 and the explosive directives, since you only need 5 out of the 6, one of which you HAVE to pay for C4, you can get ARX C4 without paying the 700 for regular C4
my question is, since it is an unlock, once unlocked, i should get it on ALL classes that can use C4, right?

yes

Thanks

N o, you have to unlock it for every class separately if unlocked with certs
Don't know exactly what happens if you buy it whit cash

to be clear , when you unlock auraxium c4 any class that has c4 gets it tmbk

ARK C4 is the araxium of C4, you unlock it.

so what happens if i don't have anyone with C4 and i unlock ARX C4

Considering you need about 1200 kills with C4 to unlock ARX, I'm not sure how you'd do that.

nothing says i need 1200 kills with C4? you need 5 out of 6 directives, one of which is the C4
if i need to get you a picture i will

c4, tank mines, vehicle explosions, prox mines, group kills, and... whats the sixth? i did those 5

Frag grenades.

If you get ARX C4 without using it, I call shenanigans.

well i don't want to waste 100 hours of my life trying to test that, do i get ARK on all classes once unlocked?

Yes, you get it on all classes. Even ones that you didn't buy normal C4 on.