The Smith & Wesson Magazine Spring 10-Round For S&W 400/410 is a factory replacement component designed to restore reliable feeding in compatible Smith & Wesson .40 caliber pistols. Built to original specifications, this magazine spring helps ensure consistent tension on your cartridges so each round feeds smoothly from the magazine into the chamber.

This replacement spring is intended for use in 10-round magazines for select Smith & Wesson models, including the 400, 4006, 4043, 4046, and 410. Ideal for refreshing worn or weakened springs, it is well suited for range use, training, and everyday shooting where dependable function is essential. Backed by Smith & Wesson’s long-standing reputation for quality firearms and parts, this spring offers a straightforward way to keep your pistol magazines running properly.

• Manufacturer: Smith & Wesson
• Model: Magazine Spring 10-Round For S&W 400/410
• Caliber: .40 S&W
• Capacity: 10 Rds
• Material: Steel