Direct proof of use
The M242 Bushmaster is directly tied to the 2003 Iraq War through U.S. Army Bradley fighting vehicles. Northrop Grumman identifies the M242 as the primary armament on U.S. Army and allied Bradley Fighting Vehicles, and Army acquisition reporting states that 25 mm M919 ammunition for the Bradley Fighting Vehicle was used for the first time in actual combat during Operation Iraqi Freedom.
The 3rd Infantry Division after-action report gives the clearest field-use record. It says the division's cavalry squadron and lead maneuver elements expended common ammunition, including 25 mm, almost continuously for three days after entering Iraq; it also states that the Bradley Fighting Vehicle's 25 mm gun was highly effective against armored personnel carriers, enemy tanks, and paramilitary vehicles in open and urban terrain.
Sources: Northrop Grumman M242 Datasheet, Army AL&T M919 Iraq, 3rd Infantry Division After Action Report
Timeline
The documented use starts with the opening ground campaign. The 3rd Infantry Division report describes heavy 25 mm ammunition expenditure immediately after entry into Iraq, as lead mechanized units met resistance along their routes during the first days of the offensive.
By the later phase of offensive operations, 3rd Infantry Division lessons learned described Bradley 25 mm fire as effective against APCs, tanks, vehicles, and urban targets. Army AL&T's July-August 2003 report then recorded field feedback on M919 armor-piercing 25 mm ammunition, citing initial after-action reports from the 3rd Infantry Division and 3rd Squadron, 7th Cavalry Regiment.
Sources: 3rd Infantry Division After Action Report, Army AL&T M919 Iraq
Operational role
In this conflict, the M242 appears in the record as U.S. Bradley-family 25 mm direct-fire armament rather than as a separately transferred weapon. The supported side is the United States and coalition forces, with documented use by U.S. Army mechanized units in Operation Iraqi Freedom.
The sourced role was close-range mechanized fire support, anti-armor fire against light and armored vehicles, and force protection during urban and defensive engagements. The after-action report notes that M2 Bradleys were well suited to the urban environment because their size, elevation, deflection, and barrel length let them engage and suppress vehicles and buildings at close range.
Army reporting on the M919 cartridge adds an ammunition-specific view of the same use. It describes the 25 mm armor-piercing, fin-stabilized discarding-sabot tracer cartridge as a strong performer during Operation Iraqi Freedom and says initial after-action reports indicated successful use against BMPs, T-72 tanks, and other lightly armored targets.
Sources: 3rd Infantry Division After Action Report, Army AL&T M919 Iraq, Northrop Grumman M242 Datasheet
