Mobile Tactical Cannon
THE SUM OF OVERMATCH
In large-scale combat operations, overmatch is not a single attribute. It is the sum of mobility, lethality, survivability, industrial strength, and sustained tempo to control the clock. This is SIGMA.
BORN & BRED
SIGMA is the only U.S.-built wheeled howitzer, delivering American firepower with high mobility and a fully domestic supply chain. This unique capability supports readiness while strengthening the industrial base and bringing certainty to modernization.
SIGMA’s 10x10 platform enables enhanced operational and tactical mobility, allowing the system to move efficiently across varied terrain and keep pace with maneuvering forces.
SIGMA drives battlefield dominance with rapid displacement and full armored crew protection, slashing exposure during fire and movement to deliver a decisive edge against counter‑battery attacks and fast‑evolving threats.
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155mm Fully Automated Howitzer
Provides 155mm, 52‑caliber firepower on a mobile 10×10 platform with a fully automated 40‑round magazine and autoloader for rapid, precise firing. Achieves more than 8 rounds per minute through a JBMOU compliant chamber that supports all U.S., NATO, and next‑generation munitions.
155mm Fully Automated Howitzer
Provides 155mm, 52‑caliber firepower on a mobile 10×10 platform with a fully automated 40‑round magazine and autoloader for rapid, precise firing. Achieves more than 8 rounds per minute through a JBMOU compliant chamber that supports all U.S., NATO, and next‑generation munitions.
360° Firing in All Configurations
Enables a three‑Soldier crew to fire with true 360‑degree capability across all quadrants and elevations without repositioning, providing fast and lethal 155mm indirect fires for maneuver forces.
Artillery Turret Interface
With four stabilizing outriggers and the Artillery Turret Interface, the system delivers a high rate of fire with unmatched accuracy. The interface secures the turret to the chassis, stabilizes the platform, and manages recoil forces to keep every shot precise.
Operational and Strategic Mobility: Transportable Land, Air, & Sea
SIGMA can be deployed anywhere, anytime. The highly transportable and deployable 155mm, 52-caliber Self-Propelled Howitzer (SPH) is transportable by rail, sea, and air and can be transported globally by US Air Force C-17 and
C-5 aircraft.
Highly Mobile 10x10 Wheeled Platform
SIGMA's 10x10 wheeled platform provides superior mobility across all types of terrain and leverages the FHTV line with it's Mobility Artillery Platform base. It's powerful engine, transmission and suspension system enables SIMGA to move across the battlefield with ease, maintaining pace with its supporting maneuver force.
Resupply
SIGMA can be resupplied using its integrated loading arm in approximately
15 minutes or less.
Range and Maneuverability
With a range greater than 300 miles and ability to match highway speeds, SIGMA has the speed, range, mobility and lethality needed to support an SBCT or IBCT or act in a General Support Artillery Role.
Armored Crew Cab
The armored cabin enables a three‑Soldier crew to operate with full protection, full visibility, and full environmental control. Under armor, the crew is protected from blast, fragments, harsh weather, overpressure, and fumes while delivering rapid, accurate 24/7 fires. The automated 155mm, 52‑caliber turret lets the crew run the full system from inside the cab and frees the remaining Soldiers to support resupply and other battery tasks, providing manning flexibility for commanders.
Remote Weapons
Station Capable
SIGMA incorporates various self-defense capabilities such as a Soldier operated crew served weapon mounted on a pintel atop the crew cab, a remote weapon system turret integration, Active Protection Systems, Counter-UAS, in addition to various optic integrations per
customer requirement.
Largest On-board Ammo Quantity (40 rounds)
Delivers greater lethality than the M109 and M777, using vertical projectile carousels with an inductive fuze setter and increment dispensing magazines for rapid fire. Large magazines and fast resupply enable superior volume of fire. The JBMOU compliant 52‑caliber, 155mm armament fires all U.S. and NATO standard rounds, with XM1113 and XM1115 pushing range past 70 kilometers.
Multiple Round Simultaneously Impact Capable
Multiple Round Simultaneous Impact delivers powerful, coordinated effects from a single system, striking targets with devastating timing and precision. The 155mm, 52‑caliber cannon fires all NATO and JBMOU‑compliant ammunition and draws on more than 70 years of proven artillery expertise to increase lethality on every mission.
Shoot and Scoot
SIGMA rapidly emplaces and is ready to fire within 45 seconds. The fully automated turret enables faster effects on target than any manned system. Displacement occurs in seconds, proving SIGMA's survivability and lethality.
Direct Fire Capable
SIGMA is capable of performing direct fire missions and has hunter-killer capabilities when paired with appropriate sights.
Increased Usability of Firing Positions
SIGMA's rapid emplacement and displacement, and superior mobility allow it to use any location as a firing point. Whether road, field, or forest, SIGMA supports troops in contact with speed and accuracy. Combined with Sigma's true 360° firing ability, Sigma makes US Army crews more lethal, mobile and survivable.
Designed for Field Maintainability
Designed by Artillerymen for Artillerymen, SIGMA can be maintained in the field by the same MOS soldiers in today's artillery battalions. The MAP truck shares similar maintenance requirements to all FHTV's across the US Army.
