Infrared Guided Missile Tracker

Add a specialized piece of U.S. guided missile fire-control history to your collection with this Infrared Guided Missile Tracker, identified by Part Number 10121399 and FSN 1430-921-6445. This component is listed as manufactured by Philco Corp., Aeronutronics Division and belongs to the guided missile remote-control / infrared tracking equipment category.

Historical Significance

This tracker is tied to the U.S. Army guided missile equipment world rather than ordinary commercial electronics. The 1430 Federal Supply Class covers Guided Missile Remote Control Systems, including specially designed components and accessories for guided missile remote-control equipment.

Army technical manual references list the Guided Missile Infrared Tracker, NSN 1430-00-921-6445, as part of the Shillelagh Guided Missile System support documentation, alongside related components such as the signal data converter, infrared modulator, target tracking rate sensing unit, infrared transmitter, guided missile test sets, and MGM-51A/B/C Shillelagh guided missiles.

That makes this part especially relevant to collectors of guided missile fire-control systems, infrared tracking equipment, Cold War armor technology, Shillelagh missile system components, and U.S. Army missile electronics.

The Infrared Tracker Connection

The Infrared Guided Missile Tracker was part of a larger guided missile remote-control system. In that system family, infrared tracking and transmitter components supported missile guidance, target tracking, and control-system operation. Technical manual listings place this item within Group 2200 – Tracker, Infrared, Guided Missile, with P/N 10121399 and NSN 1430-00-921-6445.

This part also appears in later Army modification records. A Shillelagh manual list identifies a modification work order for Infrared Tracker 10121399, adding items such as self-locking nylon setscrews, a rigid-arm actuator, differential screw assembly, and EMI filter. That confirms this part number’s place in the working technical support history of the missile system.

Known Identification Details

• Item: Infrared Guided Missile Tracker
• Part Number: 10121399
• FSN: 1430-921-6445
• Modern NSN Format: 1430-00-921-6445
• Catalog Nomenclature: Tracker, Infrared, Guided Missile
• JETDS / Reference Listing: SU27X0-1M
• Federal Supply Class: 1430 – Guided Missile Remote Control Systems
• Manufacturer Listed for This Item: Philco Corp., Aeronutronics Div.
• Associated System Reference: Shillelagh Guided Missile System
• Item Type: Military guided missile infrared tracking / remote-control component
• Included Item: Tracker component only, unless otherwise shown or stated

Why This Part Matters

This tracker represents the electronics and fire-control side of Cold War missile technology. Guided missile systems depended on more than the missile body itself. They required tracking units, transmitters, converters, modulators, sensing units, test equipment, and alignment systems to function as a complete weapon system.

For collectors, this part helps preserve that technical story. It is a part-numbered and stock-numbered component tied to a documented guided missile support system, making it useful for display, research, parts identification, or restoration-reference collections.

It pairs well with Shillelagh missile system manuals, guided missile electronics displays, infrared tracking equipment, M551 Sheridan / M60A2-era fire-control collections, Cold War armor exhibits, and U.S. Army missile system documentation.

About This Infrared Tracker

This listing is for one Infrared Guided Missile Tracker, identified by P/N 10121399 and FSN 1430-921-6445. 

This listing is for the tracker component only unless otherwise stated. No missile, launcher, armored vehicle, infrared transmitter, signal converter, test set, cable set, power supply, tools, manual, 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 infrared tracker is a strong fit for:

• Cold War guided missile collectors
• Shillelagh missile system reference collections
• U.S. Army missile electronics displays
• infrared tracking equipment collectors
• military fire-control component collections
• M551 Sheridan and M60A2-related research displays
• museum and archival ordnance exhibits

Approx length 18", Approx width 7", Approx height 5", Approx weight 17lbs.

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.