Mec-Gar MGSW5920B 20-Round 9mm Magazine for S&W 659/5900 Series

The Mec-Gar MGSW5920B delivers reliable feeding and extended capacity for Smith & Wesson 659, 5900, 910, and 915 pistols. This factory-specification magazine provides shooters with 20 rounds of 9mm Luger capacity in a standard-profile design that maintains the pistol's original handling characteristics.

What Makes This Different

Mec-Gar magazines are manufactured to the same specifications used by major firearm manufacturers for their factory magazines. The company's precision manufacturing process creates magazines that meet or exceed OEM tolerances, ensuring consistent feeding and reliable function. Unlike aftermarket alternatives that may require fitting or cause feeding issues, Mec-Gar magazines drop in ready to use with no modifications required.

Key Features

• 20-round capacity increases firepower over standard 15-round magazines
• Blued carbon steel construction provides corrosion resistance and durability
• Heat-treated magazine spring maintains consistent tension through thousands of cycles
• Anti-tilt follower design prevents nose-diving and ensures smooth feeding
• Standard profile maintains concealability and holster compatibility
• Removable floorplate allows for easy cleaning and maintenance
• Compatible with S&W models 659, 5900, 910, and 915 pistols

The MGSW5920B performs reliably across different ammunition weights and bullet profiles commonly used in 9mm Luger. Competition shooters benefit from the extended capacity during USPSA Production division matches, while law enforcement officers appreciate the additional rounds for duty carry. The magazine's steel construction withstands repeated loading cycles and environmental exposure without spring degradation or feeding malfunctions.

Technical Specs

• Capacity: 20 rounds
• Caliber: 9mm Luger
• Construction: Blued carbon steel body
• Spring: Heat-treated steel
• Follower: Anti-tilt polymer design
• Compatibility: S&W 659, 5900, 910, 915
• Profile: Standard (flush-fit with grip frame)
• Country of Origin: Italy

Mec-Gar's reputation for producing OEM magazines for major manufacturers translates directly to aftermarket reliability. The MGSW5920B offers shooters a cost-effective way to increase ammunition capacity without sacrificing the dependability expected from factory equipment.