Shield Arms S15 Gen 3 Magazine 15rd 9mm Glock 43X/48 Steel 3-Pack

The Shield Arms S15 Gen 3 Magazine transforms the Glock 43X and 48 from single-stack to high-capacity platforms without increasing grip width. This steel-bodied magazine holds 15 rounds of 9mm ammunition compared to the factory 10-round capacity, delivering 50% more firepower in the same compact frame.

What Makes This Different

Unlike polymer OEM magazines, the S15 uses a steel body construction that allows for thinner walls and optimized internal geometry. The patented design maintains the original grip dimensions while accommodating five additional rounds. Shield Arms engineered this magazine specifically for the 43X/48 platform, requiring no modifications to the pistol frame.

Key Features

• 15-round capacity in factory 10-round grip footprint
• Heat-treated steel body with nitride coating for corrosion resistance
• Anti-tilt follower design prevents feeding malfunctions
• Compatible with Glock 43X and 48 pistols only
• Requires Shield Arms S15 magazine catch (sold separately)
• Orange follower for easy identification and tracking
• Made in USA with lifetime warranty

Field testing demonstrates reliable feeding across various 9mm ammunition weights from 115 to 147 grains. Law enforcement agencies report consistent performance through qualification courses exceeding 1,000 rounds per magazine. The steel construction withstands repeated loading cycles and drop testing that can damage polymer alternatives. Competition shooters benefit from the extended capacity during USPSA Production division matches.

Technical Specs

• Capacity: 15 rounds 9mm Luger
• Body Material: Heat-treated steel with nitride finish
• Overall Length: 4.17 inches
• Width: 0.87 inches (same as OEM)
• Follower: Anti-tilt polymer construction
• Spring: Music wire with consistent tension
• Compatibility: Glock 43X and 48 only
• Country of Origin: United States
• Warranty: Lifetime manufacturer warranty

This three-pack configuration provides immediate backup magazines while maintaining training consistency across all carried ammunition. The Gen 3 improvements include enhanced feed lip geometry and refined follower design based on extensive field feedback.