This achievement is best done on the first civil war mission "Night Moves". Keep moving from checkpoint to checkpoint without killing anyone with any firearms or rifles. Press
to equip the chasers. When ever you see any enemies with a blue aura press the
to release the chasers. When you see that your chasers are on a enemy with blue aura press
to detonate your chasers. You are limited to how many chaser balls you have. Once they are all gone your character will switch back to his sidearm or rifle. Make sure you do not fire any bullets. However, you can pistol whip enemies. Complete this mission with just using your chasers and the achievement will pop at the end of the mission. One thing to keep in mind, use the
to sprint often.