The Smith & Wesson Magazine Spring Single For S&W 400/4586 is a factory replacement spring engineered to restore smooth, reliable feeding in compatible Smith & Wesson .45 ACP pistols. Built to original specifications, this single magazine spring is designed to work with models 400, 4506, 4516, 4566, 457, and 4586, providing consistent tension and dependable performance shot after shot.

This replacement spring is ideal for refreshing worn magazines that no longer lock rounds in place or feed as positively as they once did. Whether you spend most of your time on the range, in training, or simply maintaining a trusted defensive sidearm, a fresh OEM magazine spring helps ensure your pistol runs as intended. Backed by Smith & Wesson’s long-standing reputation for quality firearm components, it offers a straightforward way to keep your magazines in serviceable condition.

• Manufacturer: Smith & Wesson
• Model: Magazine Spring Single For S&W 400/4586
• Caliber: 45 ACP
• Quantity: 1
• Compatible Models: 400, 4506, 4516, 4566, 457, 4586