Summary and Key Points: The U.S. Army has officially pivoted from the incremental SEPv4 upgrade to the revolutionary M1E3 Abrams, a next-generation platform designed to reclaim battlefield dominance.
-Faced with a dire warning from the Army Science Board that the current Abrams will be “inadequate” by 2040, the M1E3 aims to shed 10 tons, integrate an unmanned turret with an autoloader, and debut the service’s first hybrid-electric combat drive.
At the Detroit Auto Show, 19FortyFive visited the new M1E3 tank. Image Credit: 19FortyFive.com.
M1E3 from the Detroit Auto Show. Taken by 19FortyFive.com on 1/17/2026.
-While the combat-proven M1A2 SEPv3 remains the temporary gold standard, the M1E3 is the essential hedge against a future where drone swarms and near-peer countermeasures threaten to turn traditional heavy armor into obsolete targets.
Beyond 2040: The Secret Tech Making the M1E3 Abrams a “Drone-Killer”
The M1E3 Abrams is a next-generation version of the M1 Abrams tank under development by the US Army to be lighter, more technologically advanced, and more survivable than its predecessors.
It features a hybrid-electric drivetrain, an unmanned turret with an autoloader, and a modular open systems architecture for easier upgrades. It is designed to counter threats like drones and advanced anti-tank weapons.
The Army expects to receive the initial prototypes in 2026, with initial operational capability anticipated in the early 2030s.
The M1A2 Abrams SEPv3 is widely regarded as one of the best and most capable main battle tanks in the world, frequently ranked at or near the top for 2025–2026 due to its superior firepower, advanced protection (including Trophy APS), and enhanced electronics.
M1 Abrams SEPv4 Canceled
The Army’s M1 Abrams System Enhancement Package Version 4 (SEPV4) was a proposed modernization of the long-standing American main battle tank (MBT). These upgrades offer numerous improvements over the previous SEPv3 configuration.
M1E3 Tank from the Detroit Auto Show. Photo Taken By 19FortyFive Staff on 1/17/2026.
M1E3 Tank at the Detroit Auto Show. Image Credit: 19FortyFive.
M1E3 Tank at the Detroit Auto Show. Image Credit: 19FortyFive.
However, the M1 Abrams SEPv4 upgrade was cancelled due to concerns about its weight, mobility, and potential loss of future battlefield dominance.
The Army decided to focus on a more radical modernization effort, the M1E3, which will incorporate lessons learned from the SEPv4 and address the evolving threats on future battlefields.
The Army Moves Ahead With the M1A2 SEPv3 Abrams
Meanwhile, the Army will continue to fund the M1 Abrams SEPv3 (System Enhancement Package Version 3) variant.
This tank features advanced technologies, including enhanced infrared detection and a more powerful 120mm cannon. It will also include some of SEPv4’s features and have a modular design, making it easier to incorporate new technology into an older weapon system.
Once testing is complete, it will be named the M1A3 Abrams.
The Army has stated that the M1E3 Abrams will be the service’s first hybrid-electric combat vehicle.
The objective of this revolutionary change in basic armored vehicle propulsion technology will be to reduce the Army’s armored corps’ fuel consumption and extend the battlefield endurance of the entire M-1 fleet.
M1 Abrams. Image Credit: Creative Commons.
An M1A2 Abrams SEP V2 main battle tank, assigned to Cold Steel Troop, 1st Squadron, 11th Armored Cavalry Regiment, fires a M865 target practice cone stabilized discarding sabot with tracer on December 9, 2021, at the National Training Center and Fort Irwin training area.
Oregon Army National Guard M1A2 Abrams battle tank with Alpha Troop, 3rd Squadron, 116th Cavalry Regiment, engages a target at a firing range during annual training at the Orchard Combat Tranining Center near Boise, ID, June 19, 2021. Soldiers trained in their military occupational specialties during annual training. (National Guard photo by Spc. Dominic Trujillo, 115th Mobile Public Affairs Detachment)
Some Enhancements And Upgrades of the M1A3 Abrams
A weight reduction of approximately 10 tons from the current SEPv3.
A hybrid-electric diesel engine that will produce some 50 per cent improved fuel efficiency.
An unmanned turret similar to those in contemporary MBT designs is seen in both Europe and Russia. This could reduce crew size from 4 to 3 by incorporating a compact MEGGITT autoloader. The three crewmen will be seated in the hull.
An advanced set of armor protection developments designed to defeat drone-deployed munitions.
A command and control system that permits integration with unmanned aerial vehicles (UAVs)
An AI-powered threat detection and fire control system.
A modular open systems architecture (MOSA) will enable faster, easier integration of future technology upgrades.
Advanced protection: The tank will feature active and passive protection systems to defend against threats such as drones and missiles.
TWZ recently wrote that “the service has already integrated the Israeli-designed and combat-proven Trophy APS onto a portion of its existing Abrams tanks. Trophy is a hard-kill APS that uses a burst of kinetic projectiles to defeat, or at least disrupt, incoming anti-tank guided missiles (ATGMs) and other infantry anti-armor weapons, such as shoulder-fired rockets and rocket-propelled grenades. A version of the system now exists that also offers protection against drones.”
The ASB Says The Abrams Will Be Inadequate By 2040
The Army Science Board, a sanctioned independent group of experts that advises the Secretary of the Army, was candid in its report. The ASB explained in detail why the planned SEPv4 variant is inadequate for future warfare.
The study, which took several years to complete, concluded that the Abrams tank would not be usable in operations after 2040 and recommended developing additional fifth-generation armored vehicles.
“Based on our findings, the M1 Abrams will not dominate the 2040 battlefield. All of the M1’s advantages in mobility, firepower, and protection are at risk.
“The M1A2 SEP V3&4 upgrades will improve effectiveness but will not restore dominance. Near-total transparency across all domains will significantly increase the lethality our forces face. China and Russia have studied our forces and doctrine and are fielding countermeasures.”
A M1 Abrams from 5th Squadron, 4th Cavalry Regiment, 2nd Armored Brigade Combat Team, 1st Infantry Division, fires a round during a Combined Arms Live Fire Exercise (CALFEX) at Grafenwoehr Training Area, Germany, Mar 26, 2018. (U.S. Army photo by Spc. Hubert D. Delany III / 22nd Mobile Public Affairs Detachment)
The ASB report added, “We will continue to be outnumbered, which is exacerbated by a low MBT operational readiness rate and an aging fleet.”
The Abrams’ Improved Missile and Drone Defenses
The M1A2 SEPv3 has been adapted to address the threat posed by anti-tank missiles and drones. The SEPv3 features improved explosive reactive armor, and the Israeli-built Trophy Active Protection System protects NATO tanks within a 360-degree perimeter againstanti-tank missiles.
The SEPv3 defends against drone attacks through its existing armor, newly added anti-drone screens, and improved electronic warfare capabilities that jam drone signals, reducing the threat posed by small, fast-moving drones, particularly in drone swarms.
The improved third-generation Forward Looking Infrared targeting system allows the crew to fire from stand-off distances where the enemy can’t see it.
Improvements To The Abrams Lethality/Firepower
The SEPv3’s main gun is the M256 120mm smoothbore cannon. It can fire M829A4 advanced kinetic-energy and advanced multi-purpose rounds via an ammunition data link. This round is an Armor-Piercing, Fin-Stabilized, Discarding Sabot – Tracer (APFSDS-T) cartridge consisting of a depleted-uranium long-rod penetrator with a three-petal composite sabot.
These rounds will defeat third-generation explosive reactive armor (ERA) at extended ranges. ERA is designed for maximum penetration against heavily armored targets and has an effective range of 4,000 meters.
M1A2 SEPv3’s Engine and Power Generation
The M1A2 SEPv3 is powered by a Honeywell AGT1500 gas turbine engine, which produces 1,500hp.
The auxiliary power unit, located under the armor, enables the tank to operate its onboard systems with a reduced probability of detection during silent watch operations.
The generator enables the turret to operate independently of the main engine when the vehicle is stationary, improving fuel efficiency and stealth.
The Abrams Is Still #1, But #2 Is Very Close
The US Army has made superb improvements with the M1A2 SEPv3. This may allow the Abrams to remain in inventory until 2040, giving it a 60-year lifespan. The best tank in the world is now even better.
But as I wrote at the end of December, the difference between #1 the M1A2 SEPv3 Abrams and the Leopard 2A7V is very slim, with some analysts believing the Leopard is now the best tank in the world.
About the Author: Steve Balestrieri
Steve Balestrieri is a National Security Columnist. He served as a US Army Special Forces NCO and Warrant Officer. In addition to writing on defense, he covers the NFL for PatsFans.com and is a member of the Pro Football Writers of America (PFWA). His work was regularly featured in many military publications.
