Smith & Wesson CS9 / CS9C / CS9S Chief's Special 9mm Mainspring — Factory New Part 263200000

Smith & Wesson CS9 / CS9C / CS9S Chief's Special 9mm Mainspring — Factory New OEM Part

Genuine factory new Smith & Wesson OEM mainspring (hammer spring) for the CS9, CS9C, and CS9S Chief's Special 9mm semi-automatic pistols. The mainspring provides the tension that drives the hammer forward to strike the firing pin. In a DA/SA pistol like the CS9 series, the mainspring must deliver consistent tension for both the long double-action first pull and the shorter single-action follow-up shots. A weak, fatigued, or broken mainspring causes light primer strikes, failure to fire, or inconsistent ignition. Replacing it with a genuine OEM spring restores proper hammer tension and reliable function.

Specifications

• Part Number: 263200000
• Manufacturer: Smith & Wesson
• Part Type: Mainspring (Hammer Spring)
• Caliber: 9mm
• Action: DA/SA (Double Action / Single Action)
• Condition: Factory New — genuine OEM part

Compatibility

• Smith & Wesson CS9 Chief's Special (9mm) — 3rd Generation Compact
• Smith & Wesson CS9C Chief's Special Compact (9mm) — 3rd Generation Compact
• Smith & Wesson CS9S Chief's Special (9mm) — 3rd Generation Compact

Note: Verify your specific model variant before ordering.

Important Notes

• This listing is for the mainspring only. The mainspring cap, strut, and all other action parts are sold separately.
• Disassembly of the action is required for installation.
• Gunsmith installation recommended. Always function test after installation to confirm reliable ignition before carrying or firing.