M6 is a series of short-barreled weapons produced by Misriah Armory. They have seen widespread distribution through the United Nations Space Command Defense Force as lighter firearms.
- M6B Magnum Sidearm
- M6D Magnum Sidearm - The Halo: Combat Evolved pistol.
- M6C Magnum Sidearm - The Halo 2 pistol.
- M6G Personal Defense Weapon System - The Halo 3 pistol.
- M6J Carbine - A UNSC Army weapon.