U.S. Army Tests M777A2 Howitzers With New Digital Fire Control for Faster Artillery Strikes.

U.S. Army artillery crews from the 4th Infantry Division conducted live-fire missions with M777A2 155mm howitzers during Exercise Ivy Mass at Pinyon Canyon, Colorado, testing next-generation fire control systems designed to accelerate targeting and strike coordination in large-scale combat operations. Images released on May 20 by Staff Sgt. Dane Howard showed the Army pairing its combat-proven artillery platform with the Artillery Execution Suite to reduce the time between target detection and weapons engagement under battlefield conditions.

The exercise focused on compressing the full kill chain from fire mission processing to gun displacement, a capability increasingly critical against near-peer adversaries able to detect and counter artillery positions within minutes. By integrating digital command-and-control tools with mobile artillery operations, the Army is seeking to improve survivability, firing tempo, and responsiveness in contested environments where speed now determines whether artillery units can strike before being targeted themselves.

Related topic: U.S. Army Secures M777A2 155mm Cannon Tubes in $145.8M Deal to Sustain Combat Firepower.

U.S. Army Soldiers fire the M777A2 155mm howitzer during Ivy Mass at Pinyon Canyon, Colorado, testing the Artillery Execution Suite to improve artillery coordination and responsiveness in large-scale combat operations (Picture source: U.S. DoW).

The M777A2 is a 155mm, 39-caliber lightweight towed howitzer developed through a U.S. Marine Corps and U.S. Army joint program and fielded to replace the heavier M198 medium towed howitzer. The weapon weighs less than 10,000 lb, with elevation from -43 mils to +1,275 mils and 800 mils of carriage traverse, or 400 mils left and right of center. The A2 configuration is important because it adds the Block 1A software upgrade and Enhanced Portable Inductive Artillery Fuze Setter needed for Excalibur and other precision 155mm munitions, while the earlier A1 digitization introduced the onboard computer, power source, GPS, inertial navigation, radio, gunner display, and chief-of-section display.

In armament terms, the M777A2 gives a light or medium formation a full 155mm effects package without the weight penalty of a tracked self-propelled howitzer. The cannon has a range of 24 km with standard unassisted projectiles, 30.5 km with assisted projectiles, and more than 40 km with Excalibur precision-guided ammunition. Its intense rate of fire is four rounds per minute for up to two minutes, with a sustained rate of two rounds per minute, while emplacement can be achieved in under three minutes and displacement in roughly two to three minutes. Excalibur extends a 39-caliber artillery weapon to about 40 km and can achieve a radial miss distance of less than two meters, which changes the target set from area suppression alone to point targets such as command posts, radar equipment, ammunition points, or exposed air-defense elements.

The howitzer’s tactical value comes from the combination of conventional and precision ammunition. Conventional 155mm high-explosive fire remains relevant for suppression, neutralization, and shaping fires before maneuver, while smoke and illumination rounds support obscuration, marking, and night operations. Precision rounds reduce ammunition expenditure and collateral risk when the target is fixed, high-value, or located near friendly forces, but they do not eliminate the need for massed fires when the mission is to suppress a position, break an attack, or cover a withdrawal.

Mobility remains the defining design trade-off. The M777A2 can be towed by MTVR, FMTV, and M939-series trucks, transported two at a time in a C-130, loaded aboard amphibious shipping, and externally lifted by CH-47D, CH-53D, CH-53E, and MV-22 aircraft. That matters for the 4th Infantry Division because a towed 155mm gun can be dispersed, moved over limited infrastructure, or inserted into firing positions, complicating the movement of heavier tracked artillery. The limitation is equally clear: the M777A2 has no armored hull, no organic automotive mobility after uncoupling, and no crew protection once emplaced. Its survivability depends on concealment, dispersion, counter-drone discipline, short fire missions, and immediate displacement.

The digital fire-control system is therefore not a convenience feature; it is part of the weapon’s survival model. The M777A2’s digital architecture provides onboard navigation, digital communication with the fire-direction center, automatic weapon pointing, graphical and text mission displays, and precision aiming to less than one mil. Program reporting has also identified redundancy in the absence of GPS, but later technical assessments still list GPS-denied navigation, battery capacity above 2 kWh, onboard power generation, cabling reliability, and weight growth as recurring issues. These are not minor engineering details. They affect whether a gun section can receive data, verify location, lay the tube, fire, and move before hostile counter-battery sensors close the loop.

Ivy Mass also fits into the Army’s wider move from AFATDS-centered fires execution toward AXS. In May 2025, during a Soldier transformation event at Fort Bragg, AXS sent a fire mission through the Joint Targeting Integrated Command and Control Suite, AFATDS, and then AXS to an M142 HIMARS launcher for a dry-fire mission, described by the Army as its first end-to-end AXS fires thread. Applying that software environment to a live M777A2 event is a more demanding test for cannon artillery because gun lines require continuous coordination among observers, fire-direction personnel, ammunition crews, prime movers, and section chiefs.

The Army has identified range, lethality, mobility, and survivability as major long-range fires gaps, while also acknowledging that reduced reliance on air support is necessary because modern air-defense systems can threaten aircraft well beyond the forward line of troops. The M777A2 does not solve the range gap by itself, especially compared with rockets, missiles, or future extended-range cannon efforts, but it remains relevant where commanders need a 155mm gun that can be airlifted, dispersed, and tied into faster digital fire direction.

The significance of Ivy Mass is that it shows legacy tube artillery being evaluated inside a new command-and-control architecture rather than treated as a separate modernization problem. The M777A2’s battlefield utility rests on range, ammunition choice, mobility, and the ability to leave a firing position quickly. Those characteristics increasingly depend on resilient data links and usable fire-control software. The practical outcome will be measured less by a single live-fire event than by whether 4th Infantry Division artillery units can sustain fast, dispersed, and accurate fires when communications, GPS, ammunition supply, and counter-battery threats are all under pressure.

Written by Evan Lerouvillois, Defense Analyst.

Evan studied International Relations, and quickly specialized in defense and security. He is particularly interested in the influence of the defense sector on global geopolitics, and analyzes how technological innovations in defense, arms export contracts, and military strategies influence the international geopolitical scene.