The Smith & Wesson Magazine Spring For S&W 4000 is a factory replacement component designed specifically for the Smith & Wesson 4000 series handgun magazines. Built to original specifications, this spring restores proper tension and feeding reliability to worn or tired magazines, helping keep your 40 S&W pistol running smoothly.

This OEM spring is ideal for shooters who want dependable performance from their existing magazines without altering the original design. Whether you are maintaining a dedicated range gun or refreshing a trusted defensive sidearm, replacing the magazine spring is a straightforward way to improve feeding consistency and reduce the chance of malfunctions. Backed by Smith & Wesson’s long-standing reputation for quality firearm parts, this spring offers a precise fit and reliable function for your S&W 4000 magazines.

• Manufacturer: Smith & Wesson
• Model: Magazine Spring For S&W 4000
• For Gun Type: Handgun
• Caliber: 40 S&W
• Number of Rounds: 10
• Quantity: 1
• Material: Proprietary Spring Steel