(adsbygoogle = window.adsbygoogle || []).push({}); To get Extra Mags, you have to get bullet penetration kills what are they? Are they just normal kills or something else?

No, You have to shoot people through walls and other objects to get extented mags.

Yea its a pain in the ass.

For the effort on extra mags I'll just use scavenger

And also for it to count towards the challenge you have to have FMJ as attachment.