Loading 155 mm Ammunition 

M109 crewmen from the  2nd Battalion /35th (Medium Self-Propelled) Artillery Regiment are seen here loading 55 mm shells into the rear of their gun.
These mobile guns gave excellent support to 5RAR on operations.
Armament: One M185 39-caliber 155 mm howitzer with 36 rounds of ammunition, one flexible turret-mounted M2HB .50-caliber machine gun with 500 rounds
Rate of fire: Four rounds per minute for three minutes; one round per minute sustained
Maximum effective range: 11.2 miles (18 km)
(14.6 miles rocket-assisted)
Speed:
Road: 35 mph (56 kph)
Cross-country: 12 mph (19 kph)
Fuel capacity: 135 gallons internal (613 lt)
Maximum range: 217 miles (349 km)
Crew: Six: (commander, driver, gunner, 3 loaders)