26 Oct 2011 01 Apr 2014
At the beginning of Mission 9: Night Shift, your teammate will tell you to shoot out the 4 hanging lights. Take your time to aim slightly above them (between 1-2 crosshair dots), hold your breath, and wait for them to sway back and forth to take your shot. If you hit all 4 of them with only 4 tries, this achievement is yours. However, if you miss, just reload your checkpoint and try again!
Please see the video for a detailed visual on how to earn this achievement: