The Glock GLK 65011 Magazine Spring 45 G21,21SF is a factory replacement spring designed specifically for Glock 21 and 21SF .45 ACP magazines. Built to Glock’s exact specifications, this durable spring helps restore proper feeding performance and reliability to worn or tired magazines.

This OEM magazine spring is ideal for shooters who want to maintain dependable function for training, range use, or everyday readiness with their Glock 21 or 21SF. By replacing the original spring with a genuine Glock component, you help ensure consistent slide lock, smooth cycling, and reliable round stacking. It is a straightforward upgrade that reflects Glock’s focus on practical design and long-term durability.

• Manufacturer: Glock
• Model: GLK 65011 Magazine Spring 45 G21, 21SF
• Caliber: .45 ACP
• Finish: Silver
• Gun Make Compatibility: Glock