The Type-51 Tzadik Firepower Mech is a UNSC Infantry-Support Role Mech used in one of the UNSC's largest engagement in the Fall of Kobol and later used by the UNSC-Infinity in the late 2555. The Tzadik Firepower Mech were one of the best infantry support mech and capable of being responsible for maintaining it's role. 20 of the Mechs were likely used by several battalions of the UNSC Marine Corps. As noted in SI Notes, there were 300 of these units produced and built. And 250 were used in the battle of Kobol. And in 2555, 50 of these units were sent into the Infinity for testing. And they were fully used once in 2560s when it was controlled by a SPARTAN-IV Commando and the mech's upgrades were posted.