Magazine Cap Screw & Firing Pin Bushing Wrench – SliX Slot II
Protect valuable firearm components and make routine maintenance easier with the SliX Slot II Magazine Cap Screw & Firing Pin Bushing Wrench. This precision-machined, dual-purpose firearm tool is designed to remove and install compatible Uberti lever-action rifle magazine cap screws and service 3-pin firing pin bushings found on many Browning and Stoeger double-barrel shotguns.
Magazine cap screws and firing pin bushings can be easily damaged when serviced with an ordinary screwdriver, punch, or improvised tool. A poorly fitting tool may slip, deform the screw slot, enlarge bushing holes, scratch surrounding finishes, or make future removal more difficult.
The SliX Slot II Wrench uses purpose-built engagement surfaces that fit the intended components more securely. This provides improved control and leverage while helping reduce the risk of cosmetic or functional damage during firearm disassembly, parts replacement, cleaning, and routine maintenance.
Why Use the SliX Slot II Wrench?
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✔ Provides secure engagement with compatible firearm components
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✔ Helps prevent damaged Uberti magazine cap screw slots
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✔ Helps protect 3-pin firing pin bushing holes
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✔ Reduces slipping compared with improvised tools
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✔ Provides improved leverage and controlled pressure
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✔ Dual-purpose design services both rifles and shotguns
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✔ Precision CNC-machined from premium tool steel
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✔ Compact enough for a range bag, workbench, or gunsmithing kit
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✔ Useful for routine maintenance and replacement-part installation
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✔ Proudly made in the USA
Two Firearm Maintenance Tools in One
Uberti Magazine Cap Screw End
One end of the wrench is shaped to engage compatible magazine cap screw slots on Uberti lever-action rifles.
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Provides broad contact within the screw slot
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Helps reduce slipping and edge deformation
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Improves control during removal and installation
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Useful during magazine tube and forearm service
3-Pin Firing Pin Bushing End
The opposite end is designed to engage compatible 3-pin firing pin bushings found on many Browning and Stoeger double-barrel shotguns.
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Engages all three bushing holes simultaneously
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Helps distribute turning force evenly
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Reduces the need for punches or improvised tools
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Provides better control during bushing service
Firearm Compatibility
✔ Designed For
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Uberti 1860 Henry rifles
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Uberti 1866 rifles and carbines
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Uberti 1873 rifles and carbines
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Compatible Uberti magazine cap screws
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Many Browning double-barrel shotguns with 3-pin firing pin bushings
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Many Stoeger double-barrel shotguns with 3-pin firing pin bushings
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Magazine cap screw removal and installation
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Firing pin bushing removal and installation
Not Intended For
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Phillips-head screws
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Torx fasteners
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Hex or Allen fasteners
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Unrelated standard slotted screws
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General-purpose screwdriver use
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Two-pin firing pin bushings
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Bushings with different pin spacing or hole diameter
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Firearms not specifically confirmed as compatible
Important:
Always verify the component design before use. Similar-looking magazine cap screws and firing pin bushings may have different dimensions, slot widths, pin spacing, or hole sizes. The wrench should seat fully and evenly without being forced.
Signs You Need a Purpose-Built Wrench
A specialty wrench is particularly useful when a conventional screwdriver or improvised tool does not fit the component securely.
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The screwdriver blade does not fill the magazine cap screw slot
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The tool rocks or twists inside the screw slot
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The screw-slot edges show previous deformation
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The firing pin bushing cannot be safely engaged with a standard tool
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A punch engages only one bushing hole at a time
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You want to reduce the risk of scratching surrounding firearm surfaces
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A component requires more controlled leverage for removal
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You regularly service Uberti rifles or compatible double-barrel shotguns
Product Specifications
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Product Type |
Dual-purpose firearm maintenance wrench |
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Product Name |
SliX Slot II Wrench |
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Rifle Application |
Compatible Uberti magazine cap screws |
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Shotgun Application |
Compatible 3-pin firing pin bushings |
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Common Rifle Models |
Uberti 1860 Henry, 1866, and 1873 rifles and carbines |
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Common Shotgun Brands |
Compatible Browning and Stoeger double-barrel shotguns |
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Material |
Premium tool steel |
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Manufacturing Method |
Precision CNC-machined |
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Primary Benefits |
Secure engagement, improved leverage, and reduced component damage |
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Package Quantity |
One SliX Slot II Wrench |
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Country of Origin |
Proudly made in the USA |
Why Ordinary Screwdrivers Can Damage Magazine Cap Screws
A conventional screwdriver often contacts only a small portion of a magazine cap screw slot. If the blade is too narrow, too thick, tapered, or poorly aligned, pressure becomes concentrated at the outer edges of the slot.
Poor Tool Fit → Concentrated Edge Pressure → Tool Slippage → Damaged Screw Slot
The SliX Slot II profile is shaped for broader, more secure engagement with compatible cap screws. This helps distribute turning force and provides better control during removal and reinstallation.
Why a 3-Pin Bushing Tool Provides Better Control
Three-pin firing pin bushings are designed to be rotated through three small engagement holes. Using a punch, needle-nose pliers, or another improvised tool may apply force unevenly and can distort the holes or slip across the firearm’s surface.
The SliX Slot II Wrench engages the compatible bushing at all three points, helping distribute turning force evenly while providing more controlled removal and installation.
Using the Magazine Cap Screw End
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Confirm that the firearm is completely unloaded.
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Remove all ammunition from the work area.
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Verify that the cap screw matches the SliX Slot II wrench profile.
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Clean dirt, oil, and debris from the screw slot.
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Position the wrench squarely and fully inside the slot.
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Maintain firm inward pressure to keep the wrench engaged.
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Apply slow, controlled turning force.
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Stop if the wrench begins to slip or deform the screw.
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Inspect the screw and threads before reinstallation.
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Reinstall without cross-threading or overtightening.
Using the Firing Pin Bushing End
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Confirm that the shotgun is completely unloaded.
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Remove all ammunition from the work area.
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Verify that the shotgun uses a compatible 3-pin firing pin bushing.
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Clean the bushing holes so the wrench pins can seat fully.
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Align all three wrench pins with the bushing holes.
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Press the tool squarely against the bushing.
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Apply slow, even turning pressure.
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Do not continue if one or more pins are not fully engaged.
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Inspect the bushing, firing pin, and surrounding area after removal.
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Reinstall according to the firearm manufacturer’s service procedures.
Recommended Use
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Keep the wrench square to the component during use
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Fully engage all contact surfaces before applying pressure
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Use slow, controlled force rather than sudden impact
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Clean debris from slots and bushing holes before engagement
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Support the firearm securely to prevent movement
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Protect surrounding finished surfaces during maintenance
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Inspect worn or previously damaged components before reuse
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Stop if the component appears seized, cross-threaded, or distorted
Do Not Use Excessive Force
The SliX Slot II Wrench provides improved control, but it cannot prevent damage caused by a seized, corroded, cross-threaded, over-tightened, or previously damaged component.
If normal controlled pressure does not loosen the component, stop and inspect the firearm. Penetrating oil, controlled heat, replacement parts, or additional disassembly may be required. Assistance from a qualified gunsmith is recommended when the correct removal method is uncertain.
SliX Slot II Wrench Application
The purpose-built engagement surfaces provide a more secure fit than improvised tools, helping protect compatible magazine cap screws and firing pin bushings during maintenance.
Ideal For
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Uberti lever-action rifle owners
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Browning double-barrel shotgun owners
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Stoeger double-barrel shotgun owners
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Cowboy Action Shooting competitors
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Routine magazine tube maintenance
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Firing pin and firing pin bushing service
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Replacing damaged or worn components
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Home firearm-maintenance workbenches
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Professional gunsmithing tool kits
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Range bags and competition repair kits
Frequently Asked Questions
What is the SliX Slot II Wrench used for?
It is a dual-purpose tool for compatible Uberti magazine cap screws and compatible 3-pin firing pin bushings found on many Browning and Stoeger double-barrel shotguns.
Which Uberti rifles are compatible?
It is designed for compatible magazine cap screws on Uberti 1860 Henry, 1866, and 1873 rifles and carbines.
Will it fit original Winchester rifles?
Compatibility is based on the dimensions of the magazine cap screw rather than model appearance alone. This tool is specifically promoted for compatible Uberti components. Verify fit before applying pressure to any other firearm.
Does it fit every Browning shotgun?
No. It is intended for compatible Browning double-barrel shotguns that use the matching 3-pin firing pin bushing design.
Does it fit every Stoeger shotgun?
No. It is intended for compatible Stoeger double-barrel shotguns using the matching 3-pin firing pin bushing. Verify the bushing design before use.
Will it work on a two-pin firing pin bushing?
No. The firing pin bushing end is designed for a compatible 3-pin pattern.
Why not use a regular screwdriver on the magazine cap screw?
A regular screwdriver may not match the width, depth, or shape of the screw slot. Poor engagement can cause slipping, edge deformation, finish damage, or a screw that becomes increasingly difficult to remove.
Why not use a punch on the firing pin bushing?
A punch typically engages only one hole and applies force unevenly. It can slip, enlarge the hole, damage the bushing, or scratch the firearm. The SliX Slot II engages all three compatible holes at the same time.
Can the wrench remove a seized component?
It provides improved leverage and engagement, but a seized, corroded, cross-threaded, or over-tightened component may require additional service. Do not use excessive force.
Should I use penetrating oil?
A suitable penetrating product may help loosen a corroded or tightly fitted component. Follow the product manufacturer’s instructions and prevent oil from contaminating ammunition, wood finishes, or other sensitive firearm parts.
Can I use the wrench with pliers for extra leverage?
Avoid adding uncontrolled leverage unless specifically recommended. Excessive force can damage the component, wrench, or firearm. A stubborn part should be evaluated before more force is applied.
Can this tool be used as a general-purpose screwdriver?
No. Its engagement surfaces are purpose-built for the listed magazine cap screw and firing pin bushing applications.
What is the wrench made from?
The SliX Slot II Wrench is precision CNC-machined from premium tool steel.
Is professional installation required?
Routine service may be completed by someone experienced with the firearm. Seized parts, damaged components, uncertain compatibility, or firing pin repairs should be handled by a qualified gunsmith.
Is the SliX Slot II Wrench made in the USA?
Yes. Every SliX Slot II Wrench is precision CNC-machined in the United States.
Whether you are removing an Uberti magazine cap screw, servicing a compatible Browning or Stoeger firing pin bushing, or assembling a dependable firearm-maintenance kit, the SliX Slot II Wrench provides the precision engagement, leverage, and control needed to complete the job while helping protect valuable firearm components.
Its durable tool-steel construction and compact dual-purpose design make it a practical addition to the workbench, range bag, or gunsmithing kit of any shooter who regularly maintains compatible lever-action rifles and double-barrel shotguns.
Proudly Made in the USA
Every SliX Slot II Wrench is precision CNC-machined in the United States from premium tool steel for dependable strength, accurate engagement, improved component protection, and years of reliable firearm-maintenance service.
