Score “Excellent” in the Grenade Range in “Atlas”
Call of Duty: Advanced Warfare GRENADIER – Achievement / Trophy Guide
You need to score at least 1600 points on the grenade range. You can restock your grenades by getting close to the control panels where you activate the training.
If you switch to the impact grenades you can take out the closer targets quicker. Make sure you get all the drones with emp grenades. They can be taken out easy and give you a lot of points.