76 mm M32A1 rifled cannon. 30 cal in coaxial mounting. This model comes with an option to mount either a 30cal or 50cal on the turret.   
Issued to ARVN forces from the mid 1960's the Walker Bulldog proved popular as the smaller stature of the Vietnamese crew found the interior well suited.
 
In early 1971 the tank was involved in the first major tank battle of the war and was credited destroying six T54's and seventeen PT76's. 
 
Captured vehicles were also used by PAVN forces against their previous owners.