Which rank corresponds to three stripes over crossed rifles over one rocker?

The rank that corresponds to three stripes over crossed rifles over one rocker is the Staff Sergeant. In the United States Marine Corps, the rank insignia for Staff Sergeant is specifically designed to include three stripes which represent the non-commissioned officer status, crossed rifles which signify the infantry, and one rocker which indicates the level of seniority within the enlisted ranks.

This insignia clearly distinguishes the Staff Sergeant from other ranks, as the combination of three stripes and one rocker is unique to this specific rank. Understanding the insignia is important for recognizing rank and chain of command in military structures, as it relates not just to designation but also to the responsibilities and authority held by individuals in those ranks.