The armor of the M18 Hellcat was quite light to facilitate its high speed, and only provided protection from small arms fire. The lower hull armor was 12.7 mm (0.50 in) thick all around, vertical on the sides, but sloped at 35 degrees from the vertical at the lower rear and angled twice at the lower front to form a nearly rounded shape; 53 degrees from the vertical and then 24 degrees from the vertical. The hull floor was only 4.8 mm (0.19 in) thick.

represented in games as have excellent armor... American bias