M50 joint service general purpose mask
The M50 joint service general purpose mask is the United States armed forces' field protective mask, which began service in December 2009, replacing the M40 field protective mask and MCU-2/P.
The M50 is certified to MIL-SPEC PRF-EA-10003. The M50 is compact, light, comfortable and more effective as determined by the Defense Department Joint Program Executive Office for Chemical and Biological Defense. The M50 allows for a wide field of view with a single lens that spans the width of the face. The M50 has twin conformal filters, which decreases breathing resistance by 50 percent. This protective mask provides 24 hours of continuous eye-respiratory protection in nuclear, biological and chemical (NBC) environments. Another feature is an indicator which turns blue when the filter has expired. 
- American Horse, LCpl Vanessa M. (12/2/2009). "M50: New Look Same Protection". United States Marine Corps. Archived from the original on 9 March 2010. Retrieved 22 December 2009. Check date values in:
- Sanborn, James K. (June 2, 2010). "Marine Corps fielding new gas mask". Marine Corps Times. Retrieved 2 June 2010.
- Military.com: New Gas Mask on the Way
- Marine Corps fielding new gas mask (M50 Joint Service General Purpose Mask) Archived 2010-09-01 at the Wayback Machine.
- GAS! GAS! GAS! New mask on the way Archived 2011-07-22 at the Wayback Machine.
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