Unfortunately this is not a real vehicle. Rather, it is a mockup from 2019 meant to represent the Harimau, K21-105, and Sabrah light tank contenders (Sabrah was chosen in the end) in the Phillipine light tank acquisition project.
Correct me if i’m wrong, but I think the largest direct-fire-capable cannon fitted on an M113 would be the Libyan 122mm D-30 conversion, with the US and British 120mm gun-mortar prototypes coming in second.
Don’t think so, according to the source I found, the Phillipine M113 with 155mm gun is apparently supposed to represent a light tank (even if it looks more like an M108).
Oh and there’s another one that I thought of but can’t find a pic anywhere. It’s a Willys mb with 3 PFC’s inside. One at the wheel, one in the passenger seat and the last in the back with a bazooka and a smug look on his face