The M9 was perhaps the most versatile protective mask in U.S. military history, serving as a standard-issue infantry mask from the Korean War well into the Vietnam War periods and continued to emerge as a special-purpose mask long after being phased out of standard service.

M9 GasMask was initially developed and began production in 1947 and by 1951 received an update and was named the M9A1 although nothing regarding the gas mask changed the M9A1 was issued with a new carrier system.

The M9 Series Field Protective Masks are some of the most successful gas masks to be used by the United States military, derivations being adopted by at least six other countries.

The U.S. Army M9 Field Protective Gas Mask came after further development of the M5-11-7, which also used a 60mm M11 filter attached directly to the cheek. This design saw many years of use, and was copied by several other countries.

The US Army M9A1 Field Protective Gas Mask is the most successful gas mask designs ever. It remained in use for two decades and it has been copied by at least five countries. The only difference between the M9 and M9A1 are the carriers, the masks themselves are identical.

Jun 25, 2021 · The M9 Series Field Protective Masks are some of the most successful gas masks to be used by the United States military, derivations being adopted by at least six other countries.

M-9 Korean war era gas mask. Sealed in original container with factory sealed filter. Also includes the carry bag. Mint condition with some very minor surface rust on the tin container. Size Medium.

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Rare, unissued military surplus M-9 gas mask with a M11 canister filter and lens cleaning kit. Includes an olive drab canvas carry bag with 1 1/2" shoulder strap and hook clips. Its all packaged in a hermetically sealed steel can.

Nov 19, 2019 · Considering the M9A1 gas mask was the primary gas mask for the US military during the 1950s, I have yet to really see any pictures of them in use during the 50s.