Senior Airman Patrick Garner, 316th Security Forces Squadron patrolman, fires a practice round out of a M203 grenade launcher at Marine Corps Base Quantico, July 15, 2010. 316th SFS combat arms instructors qualify base defenders and forward deploying members as needed on the M203 using practice rounds that that fire up to 400 meters. (U.S. Air Force photo by Senior Airman Melissa V. Brownstein)