(adsbygoogle = window.adsbygoogle || []).push({}); Very easy and simple to do. When your primary ammo is completely out, wait about 40 seconds and your primary will refill. Also sometimes you might get heavy and special ammo as well! Thats all!

I think this is an upgrade for your current weapon but i did also notice it, might of been what i said though.

It's not a weapon upgrade, just checked.