The mask system replaces the M40/M42 series of field protective masks for the Army and Marine Corps ground and combat vehicle operations, as well as the MCU-2/P series of protective masks for Air Force and Navy shore-based and shipboard applications. read more
The M50/51 masks replace the M40 and M42, MCU-2/P series masks and the M45 of the Land Warrior Program. There are two mask variants: M50 (ground and shipboard use) and M51 (ground vehicle use). read more