Hello,
can I get information on how exactly weapons unlocking system works? I can't find such a thread on the forum.

I think I have a small problem. I do some reading on other site and there was written that on level 0 we have:
scar, dsg-1, jackal, m60 mod0, m12 nova, m17 frag, m34 flash unlocked. But in mu custom class I have 3 weapons unlocked: scar, jackal and m60. Lately I have one weapon unlock on level 12 and I could have unlocked e.g. grendal or scarab but I unlocked dsg-1 because it's primary weapon.
I would know how to gain WEAPON UNLOCK and at what level we can unlock weapons and what are those weapons.