Top Definition
From the world of Halo, a MAC (Magnetic Accelerator Cannon) gun is one of the humans defenses, usually placed on ships or orbital defense stations. Basically, a MAC gun is a similiar, if not the same, to a rail gun, with its high power and velocity/
That MAC gun just ripped a hole through that Covenant flagship!
af LUEshi owns j00 24. januar 2005

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A MAC gun is one of the UNSC's most powerful non-nuclear weapon. A MAC gun fires a ferrious core. The gun fires the 3,000 tonn projectile at 4/10th the speed of light and is the only known weapon to break through a covenant shield in one shot. MAC guns can be put on a UNSC ship or stationed above an important Earth colony
The MAC gun blasted the Covenant capitol ship in one shot
af Chris000 17. juli 2006

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