y (khakiyawn), aai corporation, airtronic usa, colt's manufacturing company, colt defense, diemaco, knight's armament company, lewis machine and tool company, mars expedition, rm equipment, u.s. ordnance, bad id, bad pixiv id, 5girls, american civil war, american revolution, animal ears, assault rifle, backpack, bag, bayonet, canteen, combat helmet, explosive, gloves, goggles, grenade, grenade launcher, gun, hat, helmet, m16, m16a1, m1 garand, m1 helmet, m203, m4 carbine, military, military combat uniform, military uniform, multiple girls, musket, randoseru, rifle, thighhighs, tricorne, underbarrel grenade launcher, united states, vietnam, war, weapon, world war ii, zettai ryouiki