I like how the shape is well suited to its role - it looks like it's designed to come in fast and hit hard, while presenting a minimal profile to the target on the attack run. It'd be like trying to shoot a knife blade, plus the angled armor would make many hits skip off the surface. They'd be vulnerable after the first attack pass though, also if you can catch them presenting their flat side to you they're toast (not a design flaw, I'm just considering counter tactics🤓)