Stinger Rounds Marines fire stinger simulation rounds aboard the USS Wasp in the Atlantic Ocean, April 17, 2016. The Marines are assigned to Medium Marine Tiltrotor Squadron 264, 22nd Marine Expeditionary Unit, which is underway for an amphibious exercise. Marine Corps photo by Cpl. Ryan G. Coleman SHARE: Download: Full Size (1.02 MB) Credit: Cpl. Ryan Coleman VIRIN: 160417-M-BE869-206D.JPG Photo Gallery