Colt Rear Sight Detent Spring – For Colt Single Action Army – Factory Part #51683
Keep your classic Colt revolver running as it should with the Colt Rear Sight Detent Spring for Colt Single Action Army 51683. This is a factory-spec replacement spring designed specifically for the rear sight detent system on Colt Single Action Army (SAA) revolvers, helping maintain proper sight function, consistent tension, and long-term reliability.
Whether you’re preserving a valuable collectible or keeping a working sixgun in top shape, using OEM Colt parts is the smart way to ensure fit, function, and authenticity.
Purpose-Built for the Colt Single Action Army
This detent spring is engineered to work with the Colt SAA rear sight assembly:
Fits Colt Single Action Army revolvers, including 3rd Generation models commonly found in .45 Colt.
Designed to provide the proper detent tension for the rear sight, helping it stay firmly in place under recoil and regular use.
Ideal for factory-correct repairs, tune-ups, and restorations where maintaining original Colt geometry and feel is important.
If your rear sight has lost its positive feel, moves too freely, or no longer holds position, a tired or missing detent spring is often the culprit—and this is the correct factory-style replacement.
Genuine Colt Factory Replacement Part
Using genuine Colt parts helps keep your revolver’s performance and value where they should be:
Manufacturer: Colt – this spring is built to Colt’s specifications, not a generic substitute.
Colt Manufacturer Part Number: 51683 – the same ID used by Colt and major parts suppliers for the SAA rear sight detent spring.
Featured by multiple reputable firearm parts dealers as the correct part for Colt SAA rear sight detent spring replacement.
If you’re cataloging or ordering parts by number, 51683 is the reference you want for this specific spring.
Helps Maintain Accuracy & Sight Function
The rear sight system on a Single Action Army might be simple, but the small parts still matter:
The rear sight detent spring works with the detent to provide positive, repeatable tension on the sight, helping it resist drifting from recoil or handling.
Replacing a worn or weakened spring can help restore consistent point of impact, especially on revolvers that see regular range or field use.
A properly functioning detent system contributes to the overall accuracy and functionality of your Colt Single Action Army.
It’s a small, inexpensive part that plays a big role in keeping your sight picture dependable.
Ideal for Repair, Restoration & Maintenance
This Colt rear sight detent spring is a must-have for:
Gunsmiths and armorers who frequently service Colt revolvers and need correct factory parts on hand.
Collectors and enthusiasts restoring original Single Action Army revolvers and aiming to keep them as authentic as possible.
Working guns that see regular use in cowboy action shooting, range practice, or field carry, where springs naturally fatigue over time.
Keeping spare small parts like detent springs on the bench is inexpensive insurance for anyone who runs or maintains classic Colts.
Professional Installation Recommended
Because the rear sight assembly is small and precise, many owners choose to have this part installed by a qualified gunsmith, especially on collectible or valuable revolvers. This helps ensure:
Correct disassembly and reassembly of the sight and frame
Proper orientation and seating of the spring and detent
Preservation of finish and original parts during the process
If you’re not experienced working on Colt revolvers, professional installation is the safest way to protect both the firearm and the new part.
Key Specifications – Colt Rear Sight Detent Spring (51683)
From Colt-part retailers and parts listings:
Brand: Colt
Part Name: Rear Sight Detent Spring for Colt Single Action Army
Manufacturer Part Number: 51683
Application / Fit:
Function:
Category: OEM replacement small part / spring
Always confirm the exact model and generation of your revolver before ordering to ensure correct fit.
SEO-Focused Summary
The Colt Rear Sight Detent Spring for Colt Single Action Army 51683 is a genuine OEM Colt replacement spring engineered specifically for the rear sight detent system on Colt SAA revolvers. Identified by Colt part number 51683, this precision spring helps maintain proper rear sight tension, reliable sight function, and overall accuracy of your Single Action Army. Ideal for repairs, restoration projects, and routine maintenance on Colt SAA revolvers—especially 3rd Gen .45 Colt models—this factory-spec rear sight detent spring is the correct small part to keep your classic sixgun performing the way Colt intended.
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