Glock G31 Magazine 10-Round .357 SIG Black Polymer MF10031

The Glock MF10031 magazine delivers reliable feeding and consistent performance for G31 pistols chambered in .357 SIG. This factory magazine maintains the same quality standards as the magazines shipped with new Glock pistols, ensuring seamless integration with your firearm.

What Makes This Different

Glock's polymer construction reduces weight by 40% compared to steel magazines while maintaining superior durability. The witness holes allow quick round counting without removing the magazine from the pistol. Factory tolerances ensure consistent feeding geometry that aftermarket magazines often struggle to replicate.

Key Features

• 10-round capacity optimized for .357 SIG cartridge dimensions
• Black polymer body with steel internal components for longevity
• Orange follower provides visual confirmation of proper seating
• Witness holes numbered for quick ammunition counts
• Drop-free design enables fast tactical reloads
• Compatible with Glock G31 and G32 pistols
• Ambidextrous magazine release compatibility

Field testing demonstrates consistent feeding across various .357 SIG loads, from 125-grain hollow points to 147-grain training ammunition. The magazine functions reliably in temperatures from -40°F to 140°F, meeting law enforcement and military environmental standards. The polymer body resists impact damage that can dent metal magazines and cause feeding malfunctions.

Technical Specs

• Capacity: 10 rounds
• Caliber: .357 SIG
• Material: Black polymer body with steel spring and follower
• Weight: 2.8 ounces empty
• Length: 4.17 inches
• Width: 1.18 inches
• Compatible Models: Glock G31, G32
• Manufacturer: Glock Inc., Austria

Factory magazines maintain warranty coverage and ensure optimal reliability when it matters most. Professional shooters and law enforcement agencies specify genuine Glock magazines for their proven track record in high-round-count scenarios.