I have a 390:1 kill death. Over 112k kills, 599th in the world in revives, leader boards all over 30+ rounds and lead in doors opened and team minded actions and revives. All my friends with shotguns are less than half as good as I am and I've never had them. There is something very simple we are missing that no one has figured out yet about this ranking system. Which doesn't mean much IMO. I've played with crossbones ransoms that play better and longer than some shotgun ranks I've seen
I also had a friend who couldn't get shotguns for the longest time despite amazing stats.
It turned out he was the type to get easily annoyed and leave games, not all the time but like one out of 3 or 4.
He left often enough or died early enough to never get a good streak going.
After learning that you needed a streak of high round games, he had shotguns the next day.
People with a high round of 121 and another with a 390 KD?
No shotguns? Holy smokes, looks like I'm never gonna get them.
Here is some more of what I suspect about the rank system.
The "high round" you need to reach and number of times in a row depends on game type. I believe you need a higher round in solo than in team. In grief you don't need a very high round or possibly only need to streak "wins" with no regard to round achieved.
Once you get shotguns, your KD comes into play. If it drops below where you got shotguns you can/will lose them. You will need to recover the KD to regain the emblem.
If you've never had shotguns, then your KD has NO bearing or effect yet.
If you already have had shotguns and lost them, then streaking high round games will have no effect (other than increasing KD which will help)
I call BS on this, you have to get a specific ammount of kills before you get the rank, you dont have to get to high rounds.