Where can I find the Drake shotgun?

The only way to get a drake shotgun is to play raid mode lots and lots. It is a completely random weapon drop. You can enhance the chance of getting it by playing infection missions as they allow rarer drops more often, but honestly, be prepared to rely on luck a lot in order to snag one. trinity bonus help but are not needed to get one. Good luck bro!

I'm running into the same issue. I've acquired several High Rollers, Pale Riders, and Mura..... whatever it's called... lol.... I've gotten them from missions, from drops, and I have seen many pale riders and high rollers in the shop, but I have yet to see a Drake with the exception of the ones in the hands of everyone I run into. I wanna think I'm just incredibly unlucky, as I've hit 50 and I'm coming up on 20 hours, but I'm worried it could be some very sad glitch x.x

I don't think there is anything you can do that will make it more likely to get one from random drops in the stages, it is probably always just the same small percentage of weapons. I'm not entirely sure, but I think high level wanted missions might have a greater chance of rare weapons, though drakes should be the same chance as other rare weapons.

Also, the Drake, along with the other rare weapons, can appear in the shop. It is very uncommon and costs a lot more BP than common weapons, but exit and reenter the shop enough and you'll see one eventually.

Like many legendary weapons, you just have to keep playing stages over and over until you get one. Also cheaper than buying it in the shop. That's how I got the lv.44 Pale Rider. The last Drake I got was lv.4 :(

I allready got 2 i didnt know they were rare but i loved their power exept the high roller it sucks found it in the shop

2 ways:
1. Random drop (mostly on Abyss difficulty, the later levels)
2. infection mission (rare mission from street passing)

personal info:
I just got an infection mission for a lv 50 drake, I just need to complete it and it's mine :)