The S15 magazine is a patent-pending, flush-fitting 15 round magazine for the Glock® 43X and Glock® 48.

The S15 is a steel magazine, and is the same length as the OEM Glock® 10 round magazine, but holds an additional 5 rounds.
 
Increased Capacity, Same Reliability
Glock® pistols and magazines are known for reliability - the S15 maintains that same Glock® reliability while giving you a 50% increase in magazine capacity in the same overall footprint.
 
Shield Arms accomplished this increased capacity with their patent-pending magazine geometry, allowing the rounds to stagger, thereby fitting more in the same amount of space.
 
Proudly made in the USA by Check-Mate.
 
The Shield Arms S15 Gen 3 is a 15-round steel magazine designed for Glock 43X and Glock 48 pistols. This patented magazine increases capacity by 50% over standard 10-round OEM magazines while maintaining the same flush-fit profile, making it ideal for concealed carry without sacrificing concealability.

Constructed from premium steel with Electroless Nickel finish, the S15 Gen 3 offers superior durability and corrosion resistance compared to polymer OEM magazines. The innovative patented staggered-round geometry maximizes capacity while ensuring reliable feeding and function.

Gen 3 Improvements

• Enhanced steel construction with improved thickness and toughness
• New US-based manufacturing for consistent quality
• Raised ribs on magazine back for perfect OEM positioning
• Electroless Nickel finishes for maximum corrosion resistance
• Modular tooling for precision manufacturing

Key Features

• 15-round capacity in flush-fit profile
• Steel construction for enhanced durability
• Easy-remove impact resistant base pad
• Compatible with Shield Arms magwells
• Patented staggered round geometry
• Electroless Nickel finishes for wear resistance

Mag Catch Recommendation
Shield Arms recommends swapping out your plastic OEM mag catch with either their standard steel mag catch or their premium steel mag catch. Here's why. If you don't swap your mag catch you may have reliability issues. If you use another manufacturer's mag catch you may have reliability issues.

Gen 3 magazines were designed to work with Shield Arms steel mag catches. If you have a first-generation aluminum mag catch, Shield Arms recommends upgrading to one of their steel mag catch offerings.
 
 

Electroless Nickel
Electroless nickel coatings are extremely uniform, corrosion and erosion resistant and provide excellent lubricity. If you are in a humid or saltwater environment, or if you sweat a lot, Shield Arms recommends Electroless Nickel.

 
Warranty
Like all Shield Arms products, the S15 magazine comes with their 100% lifetime warranty against manufacturing defects. Additionally, Shield Arms also offers a Spring for Life Guarantee - wear out your spring, get a new one for free, for life.

Please check your local laws for restrictions before ordering Magazines.

State Restrictions on Large-Capacity Magazines