Description
Anybody who has tried to swap a mainspring or firing pin on a Remington bolt using a shoelace and a coin knows how quickly that trick turns into a knuckle-buster. Sinclair's Mainspring Tool for Remington Rifles takes the fight out of it. It clamps down and compresses the mainspring in a controlled way so you can safely pull the cross pin, back out the tension, and get to the parts you need without gouging the bolt or launching a spring across the shop.
The build is what you would expect from Sinclair. The body is anodized aluminum for corrosion resistance and a long working life, the lead screw is steel so it applies force smoothly and predictably, and the oversized handle gives you plenty of leverage and grip when you are cranking against spring tension. It is the kind of tool that feels solid the first time you pick it up and keeps working the same way years down the road.
Where the Sinclair Mainspring Tool Earns Its Keep
This one shines when you are changing firing pin springs, swapping firing pins, or doing a deep clean on the bolt internals. It works on standard Remington 700-pattern bolts and also handles Stolle Panda and other actions built on the Remington-style bolt. If you shoot a custom action cut from that same blueprint, odds are good this tool will fit right in.
Pairing the Mainspring Tool With a Firing Pin Removal Tool
Worth knowing before you order: this is a spring compressor, not a full bolt teardown kit. To get the firing pin assembly out of the bolt body in the first place, most folks pair it with the Sinclair Firing Pin Removal Tool. Run the two together and the whole job goes from a wrestling match to a five-minute bench task. For anyone who cleans a Remington bolt a few times a season or tinkers with spring weights, having both on the bench just makes sense.
Key Specifications
- Manufacturer: Sinclair International
- Model: Universal Rifles
- Manufacturer Number: 22500
- UPC: 050806002746
- Tool Type: Mainspring compressor
- Body Material: Anodized aluminum
- Lead Screw Material: Steel
- Handle: Large, ergonomic grip
- Compatibility: Remington-style bolts, including Stolle Panda actions
- Category: Gunsmithing Tools & Gunsmith Supplies
What’s Included
- Sinclair Mainspring Tool for Remington Rifles
Frequently Asked Questions
What does the Sinclair Mainspring Tool for Remington Rifles do?
It compresses the mainspring inside a Remington-style bolt so you can safely disassemble the firing pin and spring from the bolt body. Compressing the spring in a controlled way lets you drive out the cross pin and relieve tension without damaging the bolt or sending parts flying. It is the go-to setup for changing firing pins, swapping spring weights, or deep cleaning the bolt internals.
Do I need any other tools to use the mainspring tool?
For a complete job, most people pair it with the Sinclair Firing Pin Removal Tool. The removal tool gets the firing pin assembly out of the bolt body first, then the mainspring tool compresses the spring so you can pull the cross pin. Used together, the two turn a tricky teardown into a quick, safe bench task. You will also want a punch on hand to drive out the cross pin.
Which rifles is the Remington mainspring tool compatible with?
It is built for standard Remington 700-pattern bolts and also works on Stolle Panda actions and other actions that use a Remington-style bolt. That covers a huge range of factory Remingtons and custom actions built on the same design. If your rifle runs a Remington-clone bolt, there is a strong chance this tool fits.
What is the mainspring tool made of?
The body is anodized aluminum for durability and corrosion resistance, and the lead screw is steel so it delivers smooth, reliable force against the spring. A large, comfortable handle gives you the leverage and control you want when working against spring tension. It is a well-built tool that holds up to repeated use over the years.





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