The M60 Patton was America's first main battle tank and a heavy-lifter for the U.S. from its adoption in 1960 to its final retirement in 1997. It's still in service in allied countries around the world and Raytheon has come out with a modernization kit to get it ready for 21st-century combat.
The Raytheon M60A3 Service Life Extension Program (SLEP) features a 950-horsepower engine (a 200-horsepower improvement), a 120mm main gun, new fire control and targeting systems with thermal and day sights, and more reactive motors to move the turret and main gun.
Replacing the old, 105mm M68 rifled gun with the L44 120mm smoothbore cannon is probably the most visible and important part of the SLEP upgrades. The L44 is also known as the M256, the main gun on the M1 Abrams main battle tank that America uses today. It features greater range and penetrating power than the M68 it is replacing.
The upgraded electric motors will allow crews to respond more quickly to enemies spotted on the battlefield than the old hydraulic motors. They also do their job more quietly, reducing the chances that the Pattons will be spotted as quickly in combat.
Meanwhile, the new, 950-hp engines will allow the tanks to reach more places more quickly, giving commanders better tactical and strategic options on the battlefield.
Finally, the sights on the tank are a leap forward for it, allowing crews to quickly and reliably engage targets with their larger cannon.
The tanks featured in a Raytheon video about the SLEP also seem to feature armor upgrades, but Raytheon hasn't commented on what new capabilities the armor gives.
For countries who field the M60 and aren't yet ready for a tank acquisition program, the SLEP offers a chance to deter aggressive neighbors without breaking the bank.