Top Definition
The MA5B Assault Rifle is gas-operated and magazine-fed. It fires 7.62mm armor-piercing rounds. Rate of fire is limited by a soldier's ability to aim, fire and change magazines. Short, controlled bursts are more accurate than fully automatic fire.
MSgt. Rotteveel fired a three-round burst into the head of the crimson Elite.
by Militant Liberal April 16, 2005

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The specific name for the of assault rifle used by the UNSC.
Corporal Bob blasted the Elite's head off with his trusty MA5B.
by Militant Liberal April 05, 2005

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