In Halo 2, how many rounds does the M6C hold in a single magazine?

The M6C Magnum, also known as the Halo 2 pistol, holds 12 rounds in a single magazine. This particular capacity was chosen by the developers to strike a balance between gameplay and realism. Limiting the magazine size to 12 rounds adds a strategic element to the gameplay as it requires players to carefully consider their shots and reload timing, contributing to the overall challenge and skill required while maintaining a reasonable capacity for an all-purpose sidearm.