Uberti 1873 Performance Mainspring System (SliXpring-Main)
Improve the lock time, action feel, and ignition consistency of your Uberti 1873 rifle or carbine with the SliXpring-Main Performance Mainspring System. Designed specifically for competition-tuned rifles, this engineered system replaces the traditional flat leaf mainspring with a modern spring assembly built for faster hammer movement, smoother operation, and dependable primer ignition.
Unlike a conventional reduced-power leaf spring, the SliXpring-Main is a complete redesign of the Uberti 1873 mainspring system. Its geometry promotes faster hammer acceleration while maintaining the spring energy needed for consistent primer strikes.
Developed for serious Cowboy Action Shooting competitors, the SliXpring-Main provides a tunable, reversible performance upgrade for shooters seeking faster response, smoother cycling, and reduced reliance on routine leaf-spring adjustment.
Why Upgrade to the SliXpring-Main?
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✔ Approximately 30% faster lock time than many tuned leaf-spring systems
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✔ Promotes faster hammer acceleration
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✔ Maintains dependable primer-strike energy
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✔ Helps provide smoother lever and hammer operation
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✔ Eliminates the traditional flat leaf mainspring
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✔ Reduces the need for routine mainspring adjustment
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✔ Includes two interchangeable hammer axles for performance tuning
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✔ Installation is fully reversible
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✔ Proudly Made in the USA
Performance Benefits
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Engineered for approximately 30% faster lock time than many tuned leaf-spring systems
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Promotes faster hammer movement and quicker shot response
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Helps maintain consistent primer ignition
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Reduces ignition problems associated with inconsistent mainspring tension
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Provides smoother hammer movement throughout the firing cycle
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Replaces the traditional flat leaf mainspring with a modern engineered system
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Requires less routine adjustment than many tuned leaf-spring setups
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Designed specifically for competition-tuned Uberti 1873 rifles and carbines
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Ideal for Cowboy Action Shooting and high-volume competition use
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Proudly Made in the USA
Two Interchangeable Hammer Axles Included
Every SliXpring-Main kit includes two interchangeable hammer axles, allowing the installer to tune the rifle for the preferred balance of lock time, primer-strike energy, and lever feel.
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Standard Axle: Provides the greatest lock-time reduction and the strongest primer-strike energy.
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Reduced-Diameter Axle: Produces a lighter, smoother lever stroke while still providing faster lock time than a conventional leaf-spring setup.
Compatibility
Fits
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Uberti 1873 rifles
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Uberti 1873 carbines
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Competition-tuned rifles
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Short-stroked rifles
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Compatible later-style lower tang configurations
Does Not Fit
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Earlier square-bridge lower tangs
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Some Border Rifle tang configurations
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Uberti 1866 rifles
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Original Winchester rifles
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Miroku-manufactured Winchester rifles
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Firearms not specifically listed as compatible
Important:
The SliXpring-Main is engineered specifically for compatible Uberti Model 1873 rifles and carbines. Minor fitting may be required due to manufacturing tolerances, lower-tang configuration, short-stroke components, or previous action work. Installation is reversible, allowing the rifle to be returned to its original factory-style mainspring configuration.
How the SliXpring-Main Improves Performance
Traditional flat leaf mainsprings rely on repeated flexing to drive the hammer. In tuned competition rifles, changes in spring tension, adjustment, wear, or geometry can affect lever feel and primer-strike consistency.
The SliXpring-Main replaces the factory-style leaf spring with an engineered spring system designed to accelerate the hammer efficiently while maintaining consistent spring pressure. This helps provide faster lock time, smoother operation, and dependable primer ignition.
Kit Includes
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One SliXpring-Main performance mainspring system
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One standard hammer axle
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One reduced-diameter hammer axle
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Components required for installation in compatible Uberti 1873 rifles
Installation Notes
The SliXpring-Main is intended for qualified gunsmiths and experienced installers familiar with Uberti 1873 action tuning.
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Confirm the rifle is completely unloaded before beginning installation.
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Minor fitting may be required depending on firearm tolerances and lower-tang configuration.
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Typical installation time is approximately one hour for an experienced installer.
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Evaluate both hammer axles to determine the preferred balance of ignition energy and lever feel.
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Confirm safe hammer, trigger, firing pin, and lever operation before returning the rifle to service.
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Installation is fully reversible.
Professional installation by a qualified gunsmith or experienced Uberti 1873 rifle tuner is recommended for proper fit, reliable ignition, and safe operation.
Ideal For
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Cowboy Action Shooting
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Competition-tuned Uberti 1873 rifles
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Short-stroke action packages
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Shooters seeking faster lock time
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Shooters seeking a smoother lever stroke
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Replacing traditional flat leaf mainspring systems
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High-volume competition and recreational shooting
Whether you're building a competition-ready Cowboy Action rifle or upgrading an existing tuned firearm, the SliXpring-Main Performance Mainspring System provides a modern, tunable alternative to the traditional flat leaf mainspring. It promotes faster lock time, smoother operation, consistent primer ignition, and dependable long-term performance.
Proudly Made in the USA
Every SliXpring-Main system is precision manufactured in the United States to provide competition-grade performance, consistent operation, and years of dependable service.
Installation Instructions
