My Rifle is My Best FriendG 25

I was having a ton of trouble getting this achievement because it’s so easy to break the conditions of the achievement. Shooting explosive barrels, using suppressed ammo, even throwing rocks as distractions, all of that will keep you from getting the achievement.

However, if you have the Season Pass (or just the Covert Warfare weapons pack) the Delisle Rifle will be your best friend. Like the Welrod, it’s integrally suppressed, which means that you can fire regular rifle bullets silently and still get the achievement.

So pick whatever level you feel most comfortable with (including DLC if you like) and the Delisle Rifle and take out as many or as few enemies as you like without worrying about aggroing the entire level or masking your shots. I was able to clear out the entire Target Fuhrer level with just the Delisle without getting spotted once on my first try. As long as you go for headshots and loot a few bodies for more ammo you’ll be fine.