How many rounds are in a standard M4 magazine?

• A. 18 rounds.
• B. 30 rounds.
• C. 20 rounds.
• D. 40 rounds.

Answer: (B)

The M4 is designed to use thirty-round magazines. This capacity strikes a practical balance between keeping weight manageable, maintaining good weapon handling and reload speed, and providing enough rounds for typical engagements without needing frequent reloading. While magazines with other capacities exist, thirty rounds is the standard issue for the M4.