I have found numerous threads from various forums on the web (including the official cod forums) asking what I asked in this thread title & no one seems to know the answer. I've even tweeted a few 3arc people, but haven't gotten a reply -- I assume they're being overwhelmed w/ tweets right now, so a reply wasn't expected.
Anyway, there doesn't seem to be any way to level up this launcher. I have 10 camos for it, but it's still only at level 1. Some people are trying to say it can't be leveled up, but it clearly can be given its 2nd Mastery Challenge: "reach the maximum weapon level at prestige 2." This challenge can't be referring to unlocking all the camos, because that's the next challenge.
So, anyone here know how to level up this launcher?