Ammo can is filled with 50-caliber shell casings. Original public domain image from Flickr https://www.rawpixel.com/image/3578469/free-photo-image-412th-theater-engineer-command-caliber-shell-casingFree Image from public domain licenseU.S. Marine Corps recruit Bianca A. Jimenez of Platoon 4002, Papa Company, 4th Recruit Training Battalion, passes ammo cans… https://www.rawpixel.com/image/8739306/photo-image-public-domain-person-graduationFree Image from public domain license