CATTB or Component Advanced Technology Test Bed is a experimental model with a 140 mm smoothbore gun, heavily armored turret and upgraded hull based on the M1's chassis. It had a mechanical loading system in turret bustle, a new engine and probably other upgrades, never fielded. The tank went trials in 1987-1988. Current status unknown.
Found it when I was poking around.![Front shot of the CATTB]()
CATTB or Component Advanced Technology Test Bed is a experimental model with a 140 mm smoothbore gun, heavily armored turret and upgraded hull based on the M1's chassis. It had a mechanical loading system in turret bustle, a new engine and probably other upgrades, never fielded. The tank went trials in 1987-1988. Current status unknown. Found it when I was poking around.

CATTB or Component Advanced Technology Test Bed is a experimental model with a 140 mm smoothbore gun, heavily armored turret and upgraded hull based on the M1's chassis. It had a mechanical loading system in turret bustle, a new engine and probably other upgrades, never fielded. The tank went trials in 1987-1988. Current status unknown. Found it when I was poking around.