What is the ammunition capacity of the M4?

The M4 carbine utilizes standard magazine options that typically include 20-round and 30-round capacities. The ability to use these magazines allows for flexibility in carrying sufficient ammunition while maintaining a manageable weight for the operator. The 30-round magazine is particularly common as it provides a balance between firepower and ease of handling, making it a preferred choice for many military and law enforcement applications. Therefore, recognizing the M4's compatibility with both 20 and 30-round magazines is essential for understanding its operational effectiveness.