Browning Hi-Power Mainspring Tool

This mainspring tool is a gunsmith-grade fixture designed specifically for the Browning Hi-Power and Springfield Armory SA-35 platform. It solves the persistent problem of wrestling with the captive mainspring assembly during disassembly and reassembly—eliminating the need for improvised clamping methods, bruised fingers, or bench-block gymnastics. By compressing and holding the mainspring securely, it allows clean removal of the support nut and pin from the mainspring strut with minimal effort.

Compatibility

• Browning Hi-Power (all standard-production models)
• Springfield Armory SA-35
• Fits both factory and aftermarket mainspring assemblies using standard strut dimensions
• Not compatible with FN HP-DA or other decocker variants without verification

Key Features

• CNC-machined steel construction – precision fit, no flex under spring load
• Captures mainspring in compressed state – allows hands-free access to strut pin and nut
• Works with standard bench vise or clamp – no specialized press required
• Compact footprint – stores easily in tool roll or bench drawer
• Manufactured in Peoria, AZ

Install Difficulty: 2/5

Requires a bench vise or C-clamp to operate the tool. Basic familiarity with Hi-Power disassembly sequence assumed. No fitting or permanent modification needed.

FAQ

Will this work with a welded or staked mainspring strut?

No. The tool is designed for standard pinned or nut-retained struts. Welded or staked assemblies will not disassemble with this tool.

Can I use this without a vise?

Not recommended. The tool functions by compressing the spring between two plates under controlled pressure. A vise or strong clamp provides the necessary force and stability.

Does this fit the FN Hi-Power clones (FEG, Arcus, etc.)?

It will fit if the clone uses a standard-length mainspring strut with the same pin/nut arrangement. Verify strut diameter and overall length before use. Some clones may require minor shimming.

Ships same business day if ordered before 2 PM ET. Covered by manufacturer’s warranty against material or workmanship defects.