M1128 Mobile Gun System

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M1128 Mobile Gun System
Mobile Gun System, firing its 105 mm cannon
Type Assault gun
Place of origin  United States
Weight 18.77 tonnes (20.69 short tons; 18.47 long tons)
Length 6.95 m (22.92 ft)
Width 2.72 m (8.97 ft)
Height >2.64 m (>8.72 ft)
Crew 3

Armor 14.5 mm resistant[1]
M68A2 105 mm cannon
M2 .50 caliber machine gun; M240C coaxial machine gun; 2, M6 smoke grenade launchers
Engine Caterpillar 3126 turbo diesel
260 kW (350 hp)
Suspension 8×8 wheeled

The M1128 Mobile Gun System is an eight-wheeled armored fighting vehicle mounting a 105 mm tank gun, based on the Canadian LAV III light-armored vehicle manufactured by General Dynamics Canada. It is in service with the United States[2] and was also being considered for adoption by several other countries, including Canada.



The MGS' remote weapon-station has a small silhouette, is stabilized and autoloading. The remote weapon-station mounts a 105 mm M68A2 rifled cannon. The vehicle is primarily outfitted to support infantry combat operations. While it could take on some of the roles of tanks, it is not designed to engage in combat with tanks. The MGS can store 18 rounds of main gun ammunition in the turret. It has a rate of fire of six rounds per minute.[3]

The MGS' 105 mm cannon can fire four types of ammunition: the M900 kinetic energy penetrator to destroy light armored vehicles; the M456A2 high explosive anti-tank round to destroy thin-skinned vehicles and provide anti-personnel fragmentation; the M393A3 high explosive plastic round to destroy bunkers, machine gun and sniper positions, and create openings in walls for infantry to access; and M1040 canister shot for use against dismounted infantry in the open.[4][5]


Because the Mobile Gun System uses a similar chassis as other MOWAG Piranha derivatives, it would have the same mobility, and could be rescued or salvaged by a Piranha-derived recovery vehicle. It has a top speed of about 100 km/h (62 mph).

Crew amenities[edit]

Because the vehicle was designed without air conditioning, crews are given individual cooling vests that circulate cooled water from outside the vehicle to the garment. Vehicle computers still overheat regularly.[3]

The large remote weapon station and relatively smaller hatch can make emergency exits difficult.[3] Because of General Dynamic's choice to incorporate a remote weapon-station into the MGS instead of a true turret it is very possible for the crew of a MGS to encounter an auto-loader stoppage in the heat of battle and not be able to repair it without disembarking from the vehicle and standing atop it to access the auto-loader.


Nine Mobile Gun Systems were allocated to a battalion.[3] There were 27 Mobile Gun Systems per Stryker Brigade, but the Army is cutting the number per brigade to 10.[6] The Army bought 142 Mobile Gun Systems total.[7] Three were lost in combat, reducing the total MGS fleet to 139 vehicles. A three-vehicle MGS platoon operates organic to a Stryker infantry company, with one MGS in support of a Stryker infantry platoon.[8]


Following the end of the Cold War some theorists believed that the existing suite of U.S. armored vehicles, designed largely to fight Soviet mechanized forces in Europe, were not well suited to the lower-intensity missions U.S. armed forces would be tasked with. This led to the development of a new armored fighting vehicle designed for lower-intensity combat, rather than large-scale battle. However in actual service vehicles derived from the LAV III and its predecessor the MOWAG Piranha have been found to be vulnerable to weapons such as the RPG-7, requiring the improvisation of slat armor to defeat anti-tank rockets.

Canada had liquidated about half of its park of Leopard 1s in the early 2000s, with the intention of replacing them with the airmobile Mobile Gun System. The decision was reversed. In fall of 2006 a squadron of Leopards were sent to Afghanistan, and as of the summer of 2007 Canada is in the process of acquiring 100 surplus Leopard 2 main battle tanks for quick deployment.[9]

Full-rate production has been indefinitely deferred.[10]


See also[edit]


  1. ^ "Army Fact File – Stryker". Retrieved 2008-04-16. 
  2. ^ Soldiers train on Stryker gun system
  3. ^ a b c d Matthew Cox (4 February 2008). "Mobile Gun System brings the heat in Iraq". Gannett Government Media Corporation. Retrieved 28 August 2011. 
  4. ^ M1128 Stryker Mobile Gun System - Globalsecurity.org
  5. ^ http://www.dtic.mil/ndia/2013armament/Hill.pdf
  6. ^ Army Looks to Mount 30mm Cannons on Strykers - Military.com, 20 September 2013
  7. ^ Uparmored Bradley Could Be Tough Enough For AMPV: Testers - Breakingdefense.com, 29 January 2014
  8. ^ Stryker Mobile Gun System (MGS) - Office of the Director, Operational Test & Evaluation. 2013
  9. ^ Capt Brian Corbett (19 September 2007). "Canada’s new main battle tank – Leopard 2". The Maple Leaf. Retrieved 10 December 2009. [dead link]
  10. ^ Brannen, Kate. "AUSA: U.S. Army Plans Post-War Management of Stryker Fleet." Defense News. February 23, 2012.

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