The JABS was conceived as a compromise between the M104 Wolverine that was deemed too expensive to operate and the aging M60 AVLB which could not adequately support the Abrams and Bradley vehicles. The vehicle provides the Army Mobility Augmentation Companies supporting Armored Brigade Combat Teams with a survivable, deployable and sustainable heavy-assault-bridging capability. Prototype development began in May 2012 when the U.S. Army Contracting Command awarded General Dynamics Land Systems and Leonardo DRS a $26 million contract to build two Joint Assault Bridge System prototypes. The contract supported the engineering and manufacturing development phase, with the GDLS prototype being built in Sterling Heights, Michigan and the Leonardo prototype built in West Plains, Missouri. The Army wanted the winner of the contract to include Anniston Army Depot's organic industrial base experience in the JAB's production. The XM1074 JABS prototypes were ready in 2014. They were delivered to Anniston Army Depot where they underwent testing and evaluation through 2016 with the Leonardo prototype being accepted as the M1074 in August. Leonardo DRS has a public-private partnership with Anniston Army Depot in Alabama to manage the M1 chassis assembly and worked with Israeli Military Industries on the design and engineering of the bridge system, according to a DRS statement. On August 23, 2016, DRS Technologies, Inc., announced that the U.S. Army had awarded it an indefinite quantity contract worth up to $400 million to build the new Joint Assault Bridge System. The Army has placed an initial order for 168 vehicles and the Marines for 29. The JABS completed its low-rate production phase from 2016 to 2018 with a total of 51 vehicles. ANAD produced 10 in fiscal year 2016, 14 in 2017 and an additional 27 in 2018. These first JABSs underwent exploitation and fire survivability testing at the Aberdeen Test Center. These tests finalized the current configuration for full-rate production and evaluated some configuration changes in the design for crew protection. United States Army Operational Test Command, Fort Hood began conducting operational testing in April 2019, with the 40th Brigade Engineer Battalion, 2nd ArmoredBrigade Combat team, 1st Armored Division. Full-rate production is scheduled to start in 2019 and expected to be completed by May 2024. The M1074 JABS will replace the M60 AVLB and M104 Wolverine on a one-for-one basis in the US Army, Army National Guard and the US Marines Corps.
Description
The M1074 Joint Assault Bridge System is based on the hull of the M1A1 version of the M1 Abrams main battle tank using the suspension system from the M1A2 and upgraded with the Total InterGrated Engine Revitalization. This is projected to lower maintenance costs as well as increased availability and unit readiness with commonality of parts with the Abrams chassis. The unit has a new hydraulic bridge launcher system as well as Embedded Diagnostics. Survivability is enhanced with components of the Tank Urban Survivability Kit including Abrams Reactive Armor Tile, Rear Viewer Sensor System and Tank-Infantry Phone. Additionally it can employ the AUTOFLUG Driver's Seat and Abrams Lightweight Underbody Kit for situational use. The Bridge Launcher Mechanism was designed by Israeli Military Industries in conjunction with Leonardo DRS. The bridging controls are a basic push-button system, similar to the M104 Wolverine, while the computer assembles the bridge and deploys it. The bridge extends its span vertically instead of horizontally as the M104 Wolverine. It can deploy an MLC95 bridge with a gap crossing of 11 meters in approximately 3 minutes.
