M6 Linebacker

Restoring protected SHORAD to heavy forces

The Linebacker addressed a practical problem: shoulder-fired Stinger teams could defend maneuver units, but dismounting to engage exposed crews and separated the air-defense weapon from the protection and mobility of the armored formation. The Army wanted a system able to keep pace with Bradleys and Abrams tanks. ^{1, 2, 3}

The solution was evolutionary rather than a new vehicle. M2A2 Operation Desert Storm Bradleys were modified so the turret carried a four-round Stinger launcher in place of the TOW antitank launcher, creating the M6 without discarding the Bradley’s existing cannon, armor, drivetrain, and digital improvements. ^{1, 2, 3}

Bradley conversion

Externally, the M6 remained close to the M2A2 ODS Bradley. The major mission change was the Stinger launcher mounted where the TOW system normally sat, allowing the crew to engage aerial targets without leaving the armored vehicle. ^{1, 2, 3}

This preserved a mature crew compartment and automotive platform while changing the vehicle’s tactical purpose. Because the conversion used the Bradley family, Linebacker units could share many maintenance procedures, parts, and mobility characteristics with the heavy brigades they were assigned to protect. ^{1, 2, 3}

Stinger missiles and 25 mm cannon

Four Stinger missiles provided the dedicated air-defense effect. The Army’s 2002 weapon-systems handbook describes the launcher as a standard vehicle-mounted arrangement integrated with the Bradley turret, giving the crew ready missiles under armor protection. ^{1, 2, 3}

The M242 25 mm cannon and M240C machine gun were retained. The cannon gave the Linebacker a direct-fire capability against ground targets and some aerial threats, but the vehicle’s primary air-defense reach came from Stinger rather than from turning the Bradley cannon into a radar-directed antiaircraft gun. ^{1, 2, 3}

FAAD command-and-control integration

A major improvement over earlier gun vehicles was connection to the Forward Area Air Defense command-and-control network. The Linebacker incorporated FAAD C2 software, GPS, and a handheld terminal that could receive warning and cueing information from outside sensors. ^{1, 2, 3}

That “slew-to-cue” concept reduced dependence on the crew spotting every threat unaided. It did not give the M6 a large independent search radar, but it placed the vehicle inside a wider sensor network, a design approach that would become increasingly important in later short-range air-defense systems. ^{1, 2, 3}

Protection and crew survivability

Because the M6 was a Bradley, its crew operated under armor and did not have to dismount a Stinger team to fire. That directly addressed survivability problems inherent in earlier Bradley Stinger Fighting Vehicle arrangements where missile operators had to leave the vehicle. ^{1, 2, 3}

Protection also allowed Linebackers to stay physically close to heavy maneuver forces. They were not tanks and remained vulnerable to heavy weapons, but the Bradley base provided a much higher level of battlefield survivability than a soft-skinned or lightly armored missile carrier. ^{1, 2, 3}

Tracked mobility

The M2A2 ODS chassis gave the Linebacker the cross-country mobility, road speed, and obstacle performance expected of the Bradley family. This mattered because air defense could only protect a moving armored brigade if it could move through the same terrain at roughly the same tempo. ^{1, 2, 3}

The M6 used the Bradley's tracked automotive arrangement, unlike the wheeled Avenger and later Stryker-based systems. Avenger was already a separate air-defense vehicle before the Linebacker program and should not be described as its chronological successor. Sharing the Bradley chassis reduced some parts and maintenance differences, but the missile installation and mission electronics added their own support requirements. ^{1, 2, 3}

Fielding and production

Linebacker production was completed by the early 2000s, and Army acquisition material described the system as an operational and support program rather than a continuing development effort. It was distributed to air-defense artillery organizations supporting heavy maneuver forces. ^{1, 2, 3}

The fleet was relatively small compared with the total number of Bradleys. That limited how much armored short-range air defense could be spread across the Army, but the vehicles gave selected formations a capability that combined missiles, armor, and heavy-force mobility in one platform. ^{1, 2, 3}

Operational service and conversion back to Bradley

M6 Linebackers deployed during the early 2000s, including service in Iraq, but the expected enemy air threat was limited. As Army priorities shifted, the Stinger mission equipment was removed from many vehicles and the hulls were converted back toward standard Bradley infantry-fighting-vehicle configurations. ^{1, 2, 3}

Removing the Stinger installation and returning hulls to Bradley configurations ended the M6's particular mounted-missile arrangement. It did not mean that all U.S. short-range air-defense weapons had disappeared. Later maneuver-air-defense development returned to an armored carrier, but with a different Stryker-based weapons and sensor package rather than a restoration of the original M6 standard. ^{1, 2, 3}

Capability boundaries

The Linebacker improved survivability and mobility for Stinger employment but was not a complete layered air-defense network by itself. Four ready missiles limited the number of engagements before reloading, and the vehicle depended on external cueing and the inherent seeker limits of Stinger for much of its performance. ^{1, 2, 3}

The M242 remained a single-barrel 25 mm chain gun rather than a dedicated radar-directed multi-barrel anti-aircraft installation. Later professional discussion about small unmanned aircraft should not be mistaken for a measured trial of the original M6. A historical vehicle description can establish the retained cannon and mounted Stinger arrangement without assigning an unsupported probability of defeating newer targets. ^{1, 2, 3}

Historical place

The M6 demonstrated that the Army could integrate short-range missiles with a maneuver fighting vehicle instead of treating air defense as a separate, lightly protected element. Its combination of armor, tracks, missiles, cannon, and network cueing anticipated several features of later designs. ^{1, 2, 3}

Linebacker placed an air-defense installation on the Bradley family rather than on a separate unarmored carrier. The later Stryker-based M-SHORAD is a different program and platform. Their shared purpose makes comparison useful, but it does not establish a direct hardware lineage or make the Stryker a reactivated M6 configuration. ^{1, 2, 3}

Sources and further reading

1. U.S. Army Weapon Systems 2002 — Bradley Linebacker
2. U.S. Army Air Defense Artillery Journal — Return of Tactical AAA
3. RAND — Air Defense Options for the Future

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