The Type-51 Carbine,[4] also known as the Covenant Carbine, is a Covenant infantry firearm, carried commonly by the Allies and the Horde. The Type-51 Carbine is a Covenant recoil-operated and charger-fed, semi-automatic weapon. The Type-51 Carbine serves as the Covenant's medium to long-range weapon and fires an 8mm caseless radioactive projectile. The weapon's design is very basic, with unique differences. The first is its magazine placement, which is located right above the trigger guard - the weapon's cylindrical magazine holds 18 rounds, and also provides indication of number of rounds left in the magazine, using a holographic display. The back end of the weapon contains two circular openings, the forward one is the weapon's hand guard and the area in front of it is where the weapon's trigger is located. On the weapon's top rail is the magazine well and loader, below it is a hammer-like device which springs back when the weapon is fired. The forward part of the weapon contains the Type-51 Carbine's barrel which itself is well insulated to protect the shooter from the harmful radiation released from the round.

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