"The M1-33-7 quickly hit the battlefield. Equipped with the marginally more useful CDC 33-6, it boasted the ability to frontally penetrate its lighter 20mm armor, and make use of APHE, which had been readily available for the CDC 33-6. The interior ammo rack was also expanded to 50 shells. However, this was later revealed to be a mistake, as the only exit made it difficult to return veteran gunnery."