This Technical Manual TM 9-252 covers the 40mm Automatic Gun M1, Antiaircraft Gun Carriage M2A1, and Gun Mount M3 and is dated May 1952. For collectors of U.S. military technical manuals, Korean War-era ordnance references, antiaircraft artillery publications, and dated government documents, this is a strong period piece tied to one of the most important categories of mid-20th-century defensive equipment: 40mm antiaircraft gun systems.
Issued during the Korean War / early Cold War period, this manual reflects a time when the U.S. military continued to maintain and update technical literature for major World War II-era ordnance systems that remained relevant in postwar service. Manuals like this were official working documents, intended to support identification, inspection, servicing, maintenance context, and field support for the equipment they covered. That makes this publication especially useful for collectors, historians, researchers, restorers, and museums looking for authentic military reference material rather than general background information.
The 40mm Automatic Gun M1, Antiaircraft Gun Carriage M2A1, and Gun Mount M3
The 40mm Automatic Gun M1 belongs to the broader family of U.S. military automatic cannon and antiaircraft artillery equipment. As identified by its nomenclature, it was a 40mm automatic gun associated with air-defense roles and ordnance-support systems.
The Antiaircraft Gun Carriage M2A1 and Gun Mount M3 are important parts of this manual’s subject matter. These components represent the support and mounting side of the system, making this manual relevant not only to the gun itself, but also to the carriage and mount equipment that helped define how the materiel was documented, supported, and maintained within the military technical system.
For collectors, that gives this manual added appeal. It documents a complete ordnance-related equipment group rather than a single isolated component and fits especially well in collections focused on 40mm antiaircraft systems, U.S. Army ordnance, Korean War-era technical manuals, early Cold War air-defense equipment, and military artillery documentation.
What This Manual Covers
As a technical manual for the 40mm Automatic Gun M1, Antiaircraft Gun Carriage M2A1, and Gun Mount M3, TM 9-252 would have served as an official military reference connected to this antiaircraft gun system and its support equipment.
In practical terms, a manual like this is especially relevant for:
That makes it useful not only as a collectible, but also as a practical historical reference for anyone studying how the U.S. military documented 40mm antiaircraft gun systems during the early 1950s.
Historical Significance
The date May 1952 places this publication in the Korean War / early Cold War period, when the U.S. military maintained extensive technical literature for both newer equipment and proven wartime systems still in service. During this period, antiaircraft artillery remained an important part of military planning, field support, base defense, and ordnance readiness.
Manuals like this reflect the technical and logistical structure behind major military equipment. They helped preserve standardized information for gun systems, carriages, mounts, support components, and maintenance documentation at a time when the Army relied heavily on detailed technical publications to keep equipment properly recorded and supported.
For collectors and historians, this manual is especially relevant to subjects such as:
Because it covers the 40mm Automatic Gun M1 together with the M2A1 antiaircraft gun carriage and M3 gun mount, this manual adds strong historical depth to collections centered on U.S. air-defense systems, artillery support equipment, ordnance materiel, and military technical manuals.
About This Manual
This listing is for Technical Manual TM 9-252 for 40mm Automatic Gun M1, Antiaircraft Gun Carriage M2A1, and Gun Mount M3, dated May 1952.
It is especially well suited for:
Because manuals were working documents, surviving examples are valued not only for their content, but also for their connection to real military documentation, inspection, maintenance support, and technical publication practice.
Why This Manual Matters
Many military manuals focus on rifles, vehicles, communications gear, or general shop equipment. This one documents a more specialized and historically important subject: the 40mm Automatic Gun M1 and its associated Antiaircraft Gun Carriage M2A1 and Gun Mount M3. That makes it especially useful for collectors who want to preserve the broader technical and logistical picture of U.S. Army air-defense equipment rather than only the weapons or vehicles themselves.
For collectors, it is a strong stand-alone Korean War-era technical manual with a focused antiaircraft ordnance subject. For researchers, it offers a useful reference point for U.S. Army ordnance documentation in the early 1950s. For museums, it helps support displays that explain not only artillery systems, but also the technical literature, mounts, carriages, and support structure that kept military equipment documented and serviceable.
Ideal For
This manual is a strong fit for:
Approx length 9", Approx width 6", Approx height .75", Approx weight 1lbs.
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