Mortar Battery Airborne Division Battle Group. FM 6-18 Division Artillery. Infantry Division. FM 6-21 Division Artillery. Infantry Division. FM 6-21 Field Artillery. Missile, Corporal. FM 6-31 Corporal Missile Firing Platoon. FM 6-31 Field Artillery. Guidance System. Missile (Corporal). FM 6-32 Field Artillery. Gunnery. FM 6-40 Field Artillery. Honest John Rocket Gunnery. FM 6-40-1 4.5 Inch Multiple Rocket Launcher M21 Towed. FM 6-55 The Field Artillery Rocket. Honest John with Launcher M289. FM 6-60 105 mm. Howitzer M2A1 on Motor Carriage M7B1 and M7B2. FM 6-74 105 mm. Howitzer M2-Series Towed. FM 6-75