Joint Service General Purpose Mask (JSGPM) M-50/M-51 - USAASC
The M50/M51 masks replace the M40 and M42, MCU2/P series masks and the M45 in the Land Warrior Program. The M53A1 can be used in either Air-Purifying Respirator, Powered Air Purifying Respirator, or Self-Contained Breathing Apparatus mode, and is the first mask to be approved for both domestic response (National Institute for Occupational ...