From its headquarters in Fort Devens, Massachusetts, the regiment commands fifteen training centers in nine states throughout the Northeast.

The reserve mission is to provide trained and qualified units and individuals to augment, reinforce, or reconstitute the active component of the Marine Corps in time of war, national emergency, and such other times as the national security may require.

The regiment also has a support company that provides one anti-armor section to every infantry battalion in the 4th Marine Division except 4th LAR and 4th Recon.

Reserve Marines of the regiment have served alongside their regular counterparts in training exercises throughout the world.

Concurrently, the regiment actively participates in numerous bilateral and multilateral theater engagement operations throughout the globe.