Which small arms weapon is used primarily for anti-armor roles in the Navy?

The MK 153 SMAW (Shoulder-launched Multipurpose Assault Weapon) is specifically designed for anti-armor roles, making it the correct choice. This weapon is a versatile, lightweight, and portable rocket launcher that fires rockets capable of penetrating armored vehicles and fortifications. Its main purpose is to provide infantry with effective firepower against enemy armor, which is essential in various operational contexts.

The M16 rifle is primarily an infantry weapon used for standard combat situations and is not specialized for anti-armor tasks. The M9 pistol serves as a sidearm for personal defense and close-quarters engagements, lacking the firepower required for anti-armor operations. Similarly, the AR-15, while a versatile firearm, is typically not configured for anti-armor use; it is more commonly utilized for sport shooting and varmint hunting rather than military applications against armored targets.