Second Extinction

i figured a really easy way to manipulate this achievement.


first what you want to do is select a bounty i personally picked get 4 kills with a scout rifle without reloading (very easy) it one shots small raptors.

second thing you want to do it obviously deploy into the map finish your bounty and then quit the game once the bounty is complete and just rinse and repeat.

guide isn't detailed but its a very straight forward achievement with this method, i hope it helps people and saves sometime.

EDIT: when i say quit the game i mean exit to xbox dashboard and then reboot the game, also you can do multiple bounties to speed up the progress, thanks @NutriWhip for pointing this out.