There is no longer an 11M MOS. MOS 11H (Heavy Anti-Armor Weapons Infantryman) and MOS 11M (Mechanized Infantryman) have been converged in the MOS 11B (Infantryman). The duties listed below are now part of MOS 11B. The fighting vehicle infantryman leads, supervises, and serves as a member of a fighting vehicle unit or activity employing vehicular and dismounted weapons in combat operations.