From Halopedia, the Halo wiki
This .30 caliber machine gun is a firearm formerly in service of the UNSC Armed Forces. It is colloquially known as the "Confetti Maker" due to its abnormally high rate of fire. It is capable of firing armor piercing rounds, such as the MUTA-AP-09334. Though retired from UNSC service, it had become popular on the black market by 2531. In that year the Confetti Maker served as the standard weapon of the Insurrectionists led by General Howard Graves on the planet Victoria.
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