Fortunately, the “howitzer Huey” never materialized. It was likely an unworkable concept, given the helicopter’s limitations.
"Initiate engineering analysis and development to remove the aft weapon system (105mm Gun), refit the aft section, and ...
The M10’s main weapon is a M35 105mm low-recoil tank gun, significantly larger than the 25mm chain gun on the Bradley, and also boasts a 12.7mm M2 heavy machine gun and 7.62 mm Coax machine gun.
The Army proposed to mount a 105 mm artillery gun on the chassis of a UH-1 Iroquois Huey helicopter. The engineers wanted to take the body of the iconic Huey helicopter and remove the nose.