Technical Manual (TM 3-4240-269-12) for XM28E4 Riot Control Agent Mask
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Technical Manual (TM 3-4240-269-12) XM28E4 Riot Control Mask
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This Technical Manual TM 3-4240-269-12 covers the XM28E4 Riot Control Agent Mask and is dated April 1968. For collectors of U.S. Army technical manuals, Chemical Corps material, Cold War protective equipment, and military support-system literature, this is a strong period reference tied to a specialized and less commonly encountered piece of Army protective gear.
Because this is a -12 technical manual, it belongs to the operator and organizational maintenance side of Army documentation. In practical terms, manuals in this category were intended to support day-to-day use, inspection, servicing, and unit-level maintenance of the equipment covered. That gives this publication more value than a simple identification reference and makes it especially useful for collectors, researchers, and restorers who want original service-era documentation.
The XM28E4 Riot Control Agent Mask
The XM28E4 belongs to the broader family of U.S. military protective masks and Chemical Corps support equipment. As identified by its nomenclature, it was a riot control agent mask, placing it in the category of specialized respiratory and face protection intended for environments involving riot control agents rather than conventional battlefield weapons systems.
The XM designation is especially important. In U.S. military nomenclature, that indicates an experimental or developmental item, which makes this manual particularly interesting from a historical standpoint. Instead of documenting only a standard, long-established service item, it preserves the technical record of a mask from the developmental side of Army protective-equipment history.
For collectors, that gives this manual added appeal. It connects Cold War protective equipment with the Army’s experimental and specialized support systems, making it more unusual than a manual for a common field mask.
What This Manual Covers
As an operator’s and organizational maintenance technical manual, TM 3-4240-269-12 would have been intended to support the practical service use of the XM28E4 Riot Control Agent Mask at the user and unit-maintenance level.
In practical terms, a manual like this is especially relevant for:
- nomenclature and identification
- operating and use guidance
- inspection and servicing procedures
- organizational maintenance reference
- care and handling information
- archival and restoration research
That makes it useful not only as a collectible, but also as a practical reference for anyone studying how the Army documented specialized protective masks during the late 1960s.
Historical Significance
The date April 1968 places this publication squarely in the Vietnam-era / Cold War period, when the U.S. military maintained extensive technical literature covering protective masks, chemical-defense equipment, riot-control systems, and other specialized support gear. Manuals like this reflect a period when Army documentation extended far beyond weapons and vehicles to include the equipment required to support personnel in hazardous or controlled-agent environments.
For collectors and historians, this manual is especially relevant to subjects such as:
- Cold War U.S. Army technical manuals
- Chemical Corps and protective equipment
- riot control agent protective masks
- experimental military support equipment
- dated military technical publications
Because it covers an XM-designated mask rather than a more common field mask or weapon system, it also adds variety to collections that already include standard ordnance or maintenance manuals.
About This Manual
This listing is for Technical Manual TM 3-4240-269-12 for the XM28E4 Riot Control Agent Mask, dated April 1968.
It is especially well suited for:
- U.S. Army technical manual collections
- Chemical Corps and protective-equipment displays
- Cold War military paper collections
- museum exhibits on military field support systems
- archive and research libraries focused on U.S. military technical publications
Because manuals were working documents, surviving examples are valued not only for their content, but also for their connection to real military training, maintenance, and support practice.
Why This Manual Matters
Many military manuals focus on weapons, vehicles, or standard combat systems. This one documents the support side of military readiness, specifically a specialized protective mask associated with riot control agent environments. That makes it especially useful for collectors who want to preserve the broader technical and logistical picture of Army Cold War preparedness rather than only front-line hardware.
For collectors, it is a solid stand-alone Cold War technical manual with a specialized subject focus. For researchers, it offers a useful reference point for Army protective-mask documentation and developmental equipment history. For museums, it helps explain the behind-the-scenes systems that supported military personnel in hazardous or controlled-agent environments.
Ideal For
This manual is a strong fit for:
- U.S. Army technical manual collections
- Cold War Chemical Corps displays
- protective mask and respiratory-equipment collections
- museum and archival reference libraries
- collectors of military paperwork and dated technical publications
Approx length 11", Approx width 8", Approx height .25", Approx weight .2lbs.
Pictures are stock images of our inventory. Unless otherwise noted, you will not be receiving the exact item shown in the pictures. The pictures are representative of the item's general condition. The item you receive might be slightly better, or worse, condition than was shown in the pictures.
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