

1/72 USN 5-inch 25 Deck Gun Mk40
1/72 USN 5-inch 25 Deck Gun Mk40: Late-War Submarine Firepower
Bring the devastating surface-strike capability of the "Silent Service" to your collection with the meticulously crafted 1/72 Scale USN 5-inch 25 Deck Gun Mk40. As the preferred deck armament for Gato, Balao, and Tench-class submarines during the latter half of WWII, this weapon was essential for finishing off damaged merchants and engaging coastal targets. At the popular 1/72 scale, this model provides the mechanical complexity and historical weight required for a museum-grade submarine build.
Engineering Precision & Tactical Fidelity
- High-Fidelity Technical Detail: The Mk40 was a specialized "wet mount" designed to withstand the immense pressure of deep submersion while remaining ready for rapid action upon surfacing. At the 1/72 scale, this kit captures those nuances with exquisite fidelity. The model includes the stubby, high-angle barrel, the intricate breech mechanism, and the open-mount pedestal that allowed for quick training and elevation by the gun crew.
- Premium High Detail Resin: Crafted in professional-grade High Detail Resin (Grey/White), this gun mount offers a level of surface smoothness that surpasses traditional plastic kits. This material is specifically chosen to preserve the fine details of the training handwheels, sighting equipment, and the reinforced mounting base—features that are critical at 1/72 scale to achieve a realistic, "heavy metal" appearance.
- Intelligent Hollowed Design: To ensure this prominent deck fitting remains lightweight and easy to secure—especially important for builders of large-scale R/C submarines—the gun features a specialized hollowed construction. This engineering choice preserves the structural integrity of the mount while reducing weight, helping to maintain the perfect stability and "sit" of your 1/72 scale hull.
A Canvas for Pacific Subsurface Authenticity
Unpainted for Total Customization: Arriving in a professional unpainted finish, the Mk40 serves as a blank canvas for your historical vision. The resin surface is optimized for high-quality primers and specialized USN palettes:
- The "Silent Service" Look: Apply standard Haze Grey or the specialized "Measure 32" camouflage patterns often seen on late-war subs.
- Realistic Weathering: The 1/72 scale is ideal for advanced techniques. Apply subtle salt-fading on the barrel, metallic wear on the breech lever, and light rust-streaking around the base bolts to achieve high levels of authenticity and realism.
Key Features & Specifications
- Accurate 1/72 Scale: Precision-scaled for seamless integration with 1/72 scale US Navy submarine hulls.
- Late-War Accuracy: Faithfully replicates the Mk40 "wet mount" configuration used to upgrade submarine firepower from 1944 onward.
- High-Quality Resin: Offers the professional surfaces and crisp edges required for competition-level display models.
- Historian-Approved Detail: Researched to ensure the barrel geometry and operator stations reflect authentic WWII USN specifications.
The Defining Armament for Your Submarine Build
The 1/72 USN 5-inch 25 Deck Gun Mk40 is more than just a detail; it represents the aggressive surface tactics of the late-war Pacific campaign. Elevate your build with a component that reflects the sheer industrial scale and operational reality of the "Mosquito Fleet" and its deep-diving counterparts.

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