This 20mm M2/M3 Sear Spring Pin is a tangible connection to the innovation and challenges of wartime weapon development. Whether for functional restoration or historical study, it highlights the engineering ingenuity and perseverance that shaped mid-century military aviation.
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Preserve a critical piece of aviation and armament history with this New Old Stock (NOS) 20mm M2/M3 Sear Spring Pin, part number A-207133. This component is designed for use in the M2 and M3 20mm automatic cannons, which were developed as part of the United States’ efforts to adopt 20mm caliber weaponry for enhanced firepower during World War II.
Key Features:
Essential for Reliable Operation: The sear spring pin is integral to the firing mechanism of the M2/M3 cannons, providing tension and stability to ensure the weapon cycles smoothly. It contributes to the overall reliability of the system, which underwent extensive modifications to meet operational demands.
Historical Significance:
The M2 cannon was based on the British Hispano-Suiza HS.404, a design that demonstrated superior firepower compared to the .50 caliber Browning machine gun. Early production challenges in the U.S., including issues with lightly struck rounds, led to significant reliability problems, particularly with the M1 variant.
By 1942, efforts to improve the weapon resulted in the M2 cannon, which was deployed on aircraft like the Lockheed P-38 Lightning. The P-38 incorporated a built-in cocking system, mitigating the impact of misfires compared to other aircraft with wing-mounted guns.
Post-war, the lessons learned from the M2 and M3 designs influenced the development of the M24 cannon, which introduced electrical cocking to address reliability concerns further.
Despite its challenges, the M2/M3 series represented a step forward in integrating heavier caliber weapons on U.S. aircraft, reflecting the evolving demands of aerial combat during the mid-20th century.
New Old Stock Condition: This pin is preserved in its original, unused state, making it an ideal choice for restorers, military historians, and collectors. Its historical authenticity adds value to restoration projects or displays of vintage aircraft weaponry.
Product Details:
Condition: New Old Stock, unused and well-preserved
Part Number: A-207133
Compatibility: Designed for the 20mm M2 and M3 automatic cannons
Collector’s Appeal: Perfect for aviation enthusiasts, restorers, and collectors of World War II-era and post-war weapon systems
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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