This video details the 'last ditch' wartime modifications made to the No4 Lee Enfield rifle, primarily between 1941-1942, to accelerate production after Dunkirk. Key changes include simplifying the rear sight to a flip aperture, altering the cocking piece and front sight protector, and switching to 2-groove rifling. The No4 Mark 1* variant, produced in the US and Canada, featured a simplified bolt release notch. Stock materials also shifted to kiln-dried wood due to shortages.
The No4 Lee Enfield's rear sight evolved significantly due to wartime production pressures. Initially featuring a complex, micrometer-adjustable Mk1 sight, production bottlenecks led to the simplified Mk2 'L' flip sight. Later, stamped steel Mk3 and Mk4 sights offered a balance of adjustability and efficient manufacturing, though nomenclature could be confusing. Post-war production often reverted to the higher-quality Mk1 design.
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