The Quadraxis went rogue and entered the service of the Ing. Its primary weapon system fires destructive matter-antimatter blasts. It uses a powerful missile battery for long-distance attacks. The Quadraxis is incredibly durable and well-armored, but its leg and foot joints are vulnerable. Damaging these joints will eventually render it immobile.
http://metroid.wikia.com/wiki/Quadraxis
vs.
Scarabs are extremely powerful, possessing an exceptionally powerful plasma beam (mounted onto its "head"😉 as well as one or two dorsally-mounted anti-air cannons
http://halo.wikia.com/wiki/Scarab
Anyway. In addition to the matter-antimatter cannon and missile battery, Quadraxis features what appears to be a machinegun type weapon, and all four of it's feet can generate shockwaves when walking. There's also a sonic weapon of some kind, and it's able to spin around like a top while sheathed in energy. Oh, and the thing is demon possessed.