Recently did a side quest to build Reskit’s 1/35 GPU-2/A gun pod, which basically has a 20mm Gatling gun, ammo, etc self contained inside.

It was carried by various aircraft including AH-1 helicopters. I thought it looked crazy big, so here it is next to an OH-58D w/ a 0.50 cal gun pod, and a GAU-19 0.50 cal Gatling gun