Mec-Gar MGSW5917B 17-Round 9mm Magazine for S&W 5900 Series

The Mec-Gar MGSW5917B delivers reliable feeding and extended capacity for Smith & Wesson 5900 series pistols, offering shooters 17 rounds of 9mm Luger ammunition in a factory-quality magazine. This standard-capacity magazine features traditional blued steel construction with proven spring technology that maintains consistent tension through thousands of loading cycles.

What Makes This Different

Mec-Gar manufactures magazines for numerous firearms companies as an OEM supplier, bringing the same quality control standards to their aftermarket products. The MGSW5917B uses heat-treated steel construction with precise tolerances that match factory specifications. Anti-friction coating on the follower reduces binding while the witness holes allow quick round counts without removing ammunition.

Key Features

• 17-round capacity increases firepower over standard 15-round magazines
• Blued carbon steel body resists corrosion and provides long-term durability
• Heat-treated music wire springs maintain tension after repeated use
• Compatible with S&W models 659, 5900, 910, and 915 pistols
• Witness holes on both sides for ammunition counting
• Anti-tilt follower design prevents feeding malfunctions
• Drop-free design allows rapid magazine changes

This magazine performs consistently across various ammunition weights and bullet profiles commonly used in 9mm Luger cartridges. Law enforcement agencies and competitive shooters rely on Mec-Gar magazines for their proven track record in high-round-count scenarios. The steel construction handles repeated drops and impacts better than polymer alternatives while maintaining dimensional stability in temperature extremes.

Technical Specs

• Capacity: 17 rounds of 9mm Luger
• Construction: Blued carbon steel body
• Spring: Heat-treated music wire
• Follower: Anti-friction coated steel
• Compatibility: S&W 659, 5900, 910, 915
• Base plate: Steel with lanyard loop
• Country of origin: Italy
• Finish: Traditional blue

Mec-Gar's reputation as an OEM supplier translates directly to aftermarket reliability, making this magazine a practical choice for extending ammunition capacity. The proven design eliminates common feeding issues while the steel construction ensures long-term performance under demanding conditions.