U.S. Military issue M40/42 Series Protective Mask (GAS MASK)
The M-40 Full Facepiece has been used for years by U.S. Armed Forces all around the world. This facepiece has been NIOSH-approved with the 3M™ Cartridge FR-C2A1 or 3M™ Cartridge FR-64 for acid gases (including chlorine), CN, CS, and P100 particulate filter.

The FR-C2A1 cartridge meets military specifications MIL-C-51560 and EA-C-1704. The FR-M40 full facepiece respirator has the capability to mount a single FR-C2A1 DIN threaded cartridge on either the right or left side.
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Comes with several unique design features suited for first responders. The silicone allows for excellent fit testing results and maximum comfort while the optional butyl rubber second skin protects the facepiece increasing respirator life and decreasing decontamination costs. A butyl coated nylon hood covers the head and neck and is easily donned to add additional protection against chemical agents and meets MIL-SPEC-C-51251. An integral drinking device permits the user to replenish fluids without having to remove the mask. A dual eyepiece format permits the respirator to easily interface with optics and to fold for storage. FR-M40 accessories include: clear and gray eyepiece outserts, spectacle kit, and buytl rubber Second Skin. The FR-M40 fits into a storage bag/carrying pouch with strap. Uses any 40mm NATO gas filter

The M40 Field Protective Mask is one of various gas masks used by the military of the United States and its allies to protect from field concentrations of chemical and biological agents, along with radiological fallout particles.

After experimentation with the XM30 Mask (adopted as the MCU-2/P), the M40 Gas Mask entered service in 1987 as the standard replacement for the M17 Field Protective Mask.

M40 Gas Mask Description

The mask consists of a silicone rubber facepiece (made in small, medium, and large sizes) with an in-turned peripheral face seal, binocular rigid eye lens system and elastic head harness. Other features include front and side voice transmitters, a drinking tube that mates with the M1 canteen cap, clear and tinted inserts, and a filter canister with NATO standard threads. The combination of M40 mask features allows the mask to be worn continuously for 8 to 12 hours.

The M40 series of gas masks are manufactured by ILC Dover, Frederica, DE. The standard nomenclature and other information for the M40 series of Protective Gas Masks is tabulated below. NSN includes mask, carrier, filters, waterproof bag, eyelens outserts & hood.

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