M1A1FEP (Firepower Enhancement Package) is USMC equivalent to US Army/ARNG M1A1SA, it differs however in smoke grenades dischargers type (US Army/ARNG uses M250, USMC uses M257) and other minor modifications. The M1A1SA (Situational Awareness) upgrade incorporates new 3rd generation Heavy Armor Package, new fire control system and sights including 2nd generation FLIR, commander FBCB2/BFT system display, improvements to commander CWS (Commander Weapon Station), new ammo racks and other minor upgrades bringing it nearly to M1A2SEP level.įurther armor protection can be improved with TUSK (Tank Urban Survivability Kit) which contains M19 ARAT-1 (Abrams Reactive Armor Tiles – 1) ERA (Explosive Reactive Armor) modules over hull sides, M19 modules are multilayer ERA type which provides high degree of protection against shaped charges with single warhead, and also some degree of protection against tandem warheads. The M1A1 upgrade added a pressurized NBC system.
With a weight of almost 62 metric tons, it's one of the heaviest main battle tanks in service. The M1 was named after General Creighton Abrams. The M1A1 Abrams is an upgrade of the M1 USA third-generation main battle tank.
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