Description
Add a small but highly specific piece of U.S. Navy 20mm gun hardware to your collection with this 20mm Mk16 Mod 4 & Mod 5 Magazine Latch Spring, identified by Part Number 5025600 and FSN 5340-201-1380. This is a military-surplus spring component associated with the magazine latch hardware used on the 20mm Mk16 Mod 4 and Mod 5 gun family.
This is the kind of part serious ordnance collectors, naval gun collectors, and restoration-reference buyers look for when documenting the small components behind a larger weapon system.
Historical Significance
The 20mm Mk16 Mod 4 and Mk16 Mod 5 were part of the post-World War II and Cold War naval 20mm gun world. George Chinn’s The Machine Gun describes the 20mm Mk16 Mod 4 as designed for installation on naval craft, primarily for use against shore and surface targets, while the Mk16 Mod 5 was also designed for naval craft gun mounts using manual triggers. The same source notes that these guns were capable of firing incendiary, tracer, and armor-piercing ammunition.
A Surface Warfare Officers School reference lists the Mk16 Mod 5 20mm Machine Gun as an auxiliary-ship weapon, with a listed weight of 875 lb, elevation range of -50 to +85 degrees, maximum range of 7,000 yards, effective range of 2,000 yards, firing rate of 650–800 rounds per minute, and magazine capacity of 170 rounds.
That history gives this small spring added interest. It is not just a generic hardware part. It belongs to the support system behind a compact naval automatic weapon used for shipboard defense, surface target engagement, and ordnance training.
The Magazine Latch Spring
This Magazine Latch Spring is a small support component tied to the magazine-retention side of the weapon system. Magazine latch parts are easy to overlook, but they are essential to the mechanical hardware that secures and releases a magazine or feed component.
Known identification details include:
- Item: 20mm Mk16 Mod 4 & Mod 5 Magazine Latch Spring
- Part Number: 5025600
- Federal Stock Number: 5340-201-1380
- Associated Equipment: 20mm Mk16 Mod 4 and Mk16 Mod 5 naval gun systems
- Item Type: Military-surplus spring / latch hardware component
- Federal Supply Class Reference: 5340 – Hardware, Commercial
- Included Item: Magazine latch spring only
FSC 5340 covers commercial hardware items, including physical components used as permanent parts of end items when not classified elsewhere.
Why This Part Matters
Small parts like this help preserve the mechanical story behind larger naval weapons. The 20mm Mk16 gun family depended on many individual springs, latches, pins, retainers, feed parts, and mount components to function as a complete system.
For collectors, this Magazine Latch Spring offers a traceable part-numbered connection to a Cold War-era naval 20mm gun system. It pairs well with Mk16 Mod 4 and Mod 5 gun references, 20mm naval ammunition displays, shipboard gun mount collections, U.S. Navy ordnance manuals, and military surplus hardware collections.
About This Spring
This listing is for one 20mm Mk16 Mod 4 & Mod 5 Magazine Latch Spring, identified by P/N 5025600 and FSN 5340-201-1380.
This listing is for the spring component only unless otherwise stated. No complete gun, magazine, mount, ammunition, latch assembly, tools, manuals, storage case, or additional accessories are included unless specifically shown or noted.
This item is intended for collection, display, restoration reference, historical research, or military surplus parts study.
Ideal For
This magazine latch spring is a strong fit for:
- 20mm Mk16 gun collectors
- U.S. Navy ordnance displays
- naval gun mount reference collections
- Cold War shipboard weapons collections
- 20mm cannon parts displays
- military surplus hardware collectors
- museum and archival ordnance exhibits
Approx length 2.75", Approx width .25", 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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