Ammo Prep Marines prepare MK-19 automatic grenade launcher ammunition for a training event at Camp Lejeune, N.C., April 29, 2016. The training honed the Marines' accuracy, communication and suppressive fire skills. Marine Corps photo by Lance Cpl. Aaron K. Fiala SHARE IMAGE: Download Image: Full Size (1.5 MB) Tags: MARINE CORPS, MARINES Photo By: Lance Cpl. Aaron Fiala VIRIN: 160502-M-QO006-031A.JPG Photo Gallery