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: Download: Full Size (1.5 MB) Credit: Lance Cpl. Aaron Fiala VIRIN: 160502-M-QO006-031A.JPG Photo Gallery