M777

The M777 is a 155 mm towed howitzer manufactured by BAE Systems and used by the ground forces of Australia, Canada, Colombia, India, Saudi Arabia, Ukraine, and the United States. Designed by Vickers Shipbuilding and Engineering between 1987 and 2003, the gun entered service in 2005 as the replacement for the heavier M198. Its combat debut came in Afghanistan, and it has since seen service in Iraq, Yemen, and — in by far the largest quantities — the Russo-Ukrainian war, where the United States has supplied Ukraine with 142 guns since 2022.

The M777’s defining feature is its weight. Extensive use of titanium in the structure brings the gun in at roughly 4,200 kg — around 42% lighter than the M198 — allowing it to be sling-loaded under medium-lift helicopters and transported by tactical airlifters. The barrel is 5.08 m long (L/33) and the carriage uses a split trail. The gun fires the full NATO 155 mm family: the unguided M107 out to around 21 km, the extended-range M795 to roughly 23.5 km, and the GPS-guided M982 Excalibur to approximately 40 km. The digital fire-control variants, the M777A1 and M777A2, carry a GPS-aided inertial navigation and pointing system and are the standard mounts for precision-guided rounds; the base M777 relies on optical sights. Sustained rate of fire is two to four rounds per minute, with a surge of eight for short periods.

In Ukrainian service the M777 has been one of the most intensively used Western artillery pieces of the war and has also become one of the most frequently claimed Russian trophies. Russian channels report repeated strikes on M777 positions by FPV drones and loitering munitions: operators from the Vostok grouping have published footage claiming destroyed guns near Tarasovka, Gavrilovka and Lesnoye through late September 2026, and Russian milbloggers claim ZALA Lancet strikes against M777 batteries in Zaporizhzhia using the manufacturer’s IRRA computer-vision targeting system, cued by Z-16 reconnaissance drones. Russian channel sashakots claims the majority of the 142 guns delivered to Ukraine have been destroyed or seriously damaged by now; that figure is contested and independent accounting is not available.

The M777 family in current production includes the baseline gun, the digitised M777A1 and M777A2, and the M777ER, an extended-range development with a longer barrel aimed at ranges approaching 70 km. The US Army’s intended successor is the Mobile Tactical Cannon, an eight-wheeled 155 mm self-propelled howitzer from Hanwha Defense USA; the first prototype was handed over to the service in October 2026. The shift from a towed to a self-propelled replacement reflects the exposure of static artillery positions to the drone surveillance and strike patterns on display in Ukraine.

The M777 remains the lightest 155 mm gun in widespread service, and its continued presence in Ukrainian fire plans reflects both the volume supplied and the absence of a direct, air-mobile replacement in Western inventories.