Primary Sight, also known as the Commander's Independent Thermal Viewer, and Gunner's Primary Sight will be upgraded with third Gen FLIR, an improved laser rangefinder and color cameras. Additional improvements will include advanced meteorological sensors, laser warning/detection receivers, directional smoke grenade launchers and integration of the new (AMP) 120mm tank round. The AN/VVR-4 laser warning receiver and ROSY rapid obscurant system have been trialed by the US Army for adoption on the Abrams tank and Bradley fighting vehicle. M1A2-K: Under development, unique variant for the Kuwaiti Army, slated to replace Kuwait's current M1A2 fleet. Tank Test Bed (TTB) Prototype TACOM project begun in 1983 with unmanned turret, three crew members in armored capsule in front of the heavy armored hull, main armament was 120 mm smoothbore gun M256, mechanical loading system under turret. Component Advanced Technology Test Bed (CATTB) was an experimental model with a XM291 140 mm smoothbore cannon, heavy armored turret and upgraded hull based on the Abrams chassis. It had a mechanical loading system in turret bustle, a new engine and other upgrades, never fielded. The tank went into trials in 1987–88. AbramsX is a technology demonstrator of the M1 Abrams series by General Dynamics Land Systems. The AbramsX features an autoloader, unmanned turret (which reduces the crew to 3), a hybrid diesel-electric power pack that gives 50% more fuel efficiency, a 30mm chain gun in a remote weapon station, active protection systems, augmented reality that would increase the crew's awareness thanks to cameras and sensors mounted around the tank's exterior, a silent mode when running on electric power, the ability to be updated more easily than existing tanks, the ability to utilize loitering munitions such as the AeroVironment Switchblade as well as surveillance drones, and reduced weight for improved mobility. In October 2022, GDLS released a video showing the Technology Demonstrator and various technology tests. Specialized RV90 Armored Recovery Vehicle: A prototype designed by General Dynamics was produced in 1988 and evaluated against the M88A1E1 later that year. The Army selected the M88A1E1, which went into production as the M88A2 Hercules. M1 Grizzly Combat Mobility Vehicle (CMV). M1 Panther II: A remote controlled mine clearing vehicle with turret removed, mine rollers on front, and the Standardized Teleoperation System. M104 Wolverine Heavy Assault Bridge M1074 Joint Assault Bridge (JAB): Bridgelayer combining a heavy "scissor" bridge with the M1 Abrams chassis. Expected to reach low-rate initial production in