MW3 - Have You Tried Turning it Off and On?Use a Shock Stick to disable an enemy Sentry GunMissions ReactorThis achievement is easy, you just need to find or start with a Shock Stick after unlocking it. Then head over to the southern helicopter, near the main building just north of this helicopter is a truck with a sentry in the back. Simply toss a shock stick at the sentry and the achievement will unlock after a few seconds. For exact information on how to do this including finding the shock stick follow my video below.