HOW TO FARM THE RANK 10 AR BLUE ROSE MK3
The AR Blue Rose MK3 is probably the best Assault Rifle in the game, for this we need to go to The Old South, Lost Gate Midpoint. We need to farm the Gold Assault Drone rare enemy so having your and your allies LUCk as high as possible might help in spawning him.
The process is pretty simple and boring, go north from the teleport and right after you pass the door look up to your left, there should be a gold drone enemy there, keep teleporting back to Midpoint until you find him.
Just be sure to buy the Barrel and Chip Cologne from Argo if you want to farm for a perfect one.
For a detailed walkthrough check the video below: