Sentinel Majors
From Halopedia, the Halo wiki
A type of Sentinel called the Enforcers. These mechanical giants have a variety of weapons. They shoot bombs from their rear, they also shoot red Needlers. The key to an Enforcer's survival is their shield in front of them. It's shields are immune to ballistic weapons like the Jackal shield, but are weak aginst plasma weapons. They also have very powerful arms, to pick up small and fast vehicles such as, Ghosts and Warthogs, but they can pick up big and powerful vehicles like the Scorpion Tanks.