The M108 was powered by a Detroit Diesel turbocharged 8V-71T 8-cylinders 405 hp engine. It used the same hull and turret as the 155 mm M109 self-propelled howitzer, and components of the M113 armored vehicle. The M108 was phased out soon after the American intervention in the Vietnam War, as the M109's 155 mm calibre was considered better fitted for the modern war.
M108 howitzers sole use in combat occurred in the Vietnam War, where they were the first U.S. Army field artillery unit deployed to the conflict when the 3-6 Field Artillery battalion was deployed to Pleiku in June 17, 1966. This was shortly followed by the 1-40th Field Artillery Battalion in Dong Ha in October, 1966. M108s were generally employed from fortified fire bases providing artillery support to units in the field. Because M108 and M109 howitzers could traverse their main gun 360 degrees, unlike towed artillery, they were ideal for holding fire base positions, which might be subject to attack from any direction. Both M108 battalions were withdrawn by the mid 1970s, and the type then phased out of U.S. Army service.
- Length: 6.11 m
- Width: 3.15 m
- Height: 3.28 m
- Weight: 21 t
- Speed: 56 km/h (35 mph)
- Range: 360 km
- Crew: 5
- Primary: M103 105 mm Howitzer
- Secondary: .50 caliber (12.7 mm) M2 machine gun
- Rate of fire: 4 rds/min
- Shooting range: 11.5 km (HE) 15 km (HERA)
- Belgian Army: 90, until the 1980s.
- Khmer National Army: withdrawn
- Brazilian Army: 72 M108AP withdrawn
- Spanish Army: 48, withdrawn
- Republic of China Army: 100
- Turkish Army: 26 M108T withdrawn 
- US Army: withdrawn
- Tunisian Army: 48
FV433 Abbot SPG - British 105mm SPG
- List of U.S. military vehicles by model number
- List of U.S. military vehicles by supply catalog designation SNL G-296
- M7 Priest
- Zaloga, Steven (2005). M109 15mmm Self_Propelled Howitzer 1960-2005. Osprey Publishing. pp. 9–13. ISBN 1-84176-631-3.
- Ross, Russell, ed. (1987). Cambodia, a Country Study. Area Handbook Series (Third ed.). Washington, D.C.: Department of the Army, American University. p. 313. ISBN 978-0160208386.
- "Weapons Transfers and Violations of the Laws of War in Turkey". James Ron. Google. Retrieved 13 March 2014.