Which M9 Pistol ammunition round is only authorized for law enforcement personnel?

The MK243 MOD 0 round is specifically designed for law enforcement use, making it the authorized choice in this context. This ammunition provides enhanced capabilities, including improved accuracy and terminal performance, suited for scenarios that law enforcement personnel may encounter.

The M882 round is a standard issue for military personnel and is commonly used in various military operations, while the M193 and 5.56mm NATO rounds are typically associated with standard military applications and are not exclusive to law enforcement use. This distinction highlights the specialized nature of the MK243 MOD 0, confirming that it is set apart for law enforcement purposes, ensuring they have the necessary tools for their unique responsibilities.