The Mark 2551/25 cm Portable Magnetic Accelerator Cannon is an upgraded variant of the Mark 2488 Magnetic Accelerator Cannon developed by Misriah Armory and is used on both UNSC Infinity and Ivanoff Research Station.

Differences from the Mark 2488Edit

  • Less powerful.
  • The coils glow blue when the gun fires.
  • A pair of blue bars of light circle the coils when fired.
  • Much deeper firing sound than the 2488.
  • The vent on the rear of the gun lacks the white lights of the Mark 2488


  • In the Halo 4 mission Composer, the cannon is operable by the player through a glitch.[2]




  1. 1.0 1.1 1.2 1.3 Halo 4: The Essential Visual Guide, page 75
  2. YouTube - Halo 4 - NEW Vehicle: Piloting the Mac Cannon Glitch

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