This 20mm M39 Series Top Link Chute Guide is an original military component for the M39-series 20mm revolver cannon. Identified by Part Number 8407917 and FSN 1005-525-7364, it is cataloged in U.S. stock records as GUIDE, TOP, LINK CHUT. This places it in the gun’s link-chute / ammunition-feed hardware group, a category of parts that is often much harder to locate than the major assemblies.

The M39 was one of the principal U.S. aircraft cannons of the Cold War era. Developed for the U.S. Air Force in the late 1940s, it was a single-barrel 20mm revolver cannon chambered in 20×102mm and used on aircraft, including the F-86, F-100, F-101, B-57, and later the F-5. The M39 family gave U.S. aircraft a compact, hard-hitting cannon system at a time when fighter armament was moving away from machine guns and toward higher-performance automatic cannon. Because the gun relied on a linked-belt feed system, components associated with the feeder, chute, and guide hardware were necessary to keep the system properly configured.

This part’s stock-record item name, GUIDE, TOP, LINK CHUT, indicates that it belongs to the link chute area of the M39 feed system. Public NSN indexing also places it in a sequence of neighboring M39-related feeder and chute parts, including ejection chutes, feeder assemblies, feeder frames, and ammunition guide tracks, which supports its identification as a specialized feed-path component rather than a generic hardware item.

For collectors and restorers, that matters. Small feed-system parts like this were often separated from complete guns, mixed into bins, or discarded long before the larger assemblies disappeared. That makes correctly identified original M39 chute and feeder components especially useful for:

M39-series cannon restorations
Aircraft armament reference collections
Museum and educational displays
Spare-parts inventories for Cold War-era aircraft cannon systems
Technical study of original U.S. revolver-cannon feed hardware

Product Specifications:
Condition: Original surplus part
Part Number: 8407917
FSN: 1005-525-7364
Item Name: Guide, Top, Link Chut
Compatibility: 20mm M39-series revolver cannon
Application: Link-chute / feed-hardware component

Historical Significance:
The M39 family was one of the first successful American revolver-cannon systems and remained an important aircraft armament type for decades. Because the gun used linked ammunition and a compact internal feed mechanism, correct guide and chute components were part of what allowed the system to function as intended. Original, specifically identified feed-path parts like this are useful not only for restoration, but also for documenting how the M39 family was assembled and supported.

Ideal For:
Restoration projects involving M39-series revolver cannons
Aviation museums and static display restoration
Spare-parts inventories for Cold War-era aircraft armament systems
Collectors of U.S. military aviation ordnance
Technical reference collections and educational displays

Approx length 5", Approx width 3", Approx height 1", Approx weight .4lbs.

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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