Quick Answer
What is the S15 Combo Pack 1? A complete capacity upgrade kit for Glock 43X/48 pistols that includes 3x S15 Gen 3 15-round magazines and 1x steel magazine catch. This all-in-one package provides everything needed to increase your pistol's capacity from 10 to 15 rounds while maintaining the slim, flush-fit profile ideal for concealed carry.
Transform your Glock 43X or 48 into a high-capacity powerhouse with the Shield Arms S15 Combo Pack 1. This complete upgrade kit combines three S15 Gen 3 15-round magazines with one essential steel magazine catch, delivering everything needed to achieve 50% more capacity without compromising the slim profile that makes these pistols ideal for concealed carry.
Perfect for concealed carry, competition shooting, law enforcement backup duty, and personal defense, this all-in-one package offers professional-grade components that work seamlessly together. Save money compared to purchasing components separately while ensuring complete compatibility and optimal performance.
What's Included
- 3x S15 Gen 3 Magazines: Latest generation 15-round flush-fit steel magazines with patented staggered-round geometry
- 1x Standard Steel Mag Catch: Black nitride coated ambidextrous magazine catch engineered for S15 magazines
- Installation Hardware: All necessary components for mag catch installation
- Installation Instructions: Detailed guide available at Shield Arms Installation Page
Gen 3 Magazine Improvements
The S15 Gen 3 represents the pinnacle of Shield Arms engineering, incorporating significant improvements over previous generations:
- Enhanced steel construction with improved thickness and toughness
- US-based manufacturing for consistent quality control
- Raised ribs on magazine back for perfect OEM positioning
- Refined follower design for improved feeding reliability
- Optimized spring geometry for consistent performance through entire capacity
- Precision modular tooling for exacting manufacturing tolerances
Key Features
- 50% capacity increase: 15 rounds vs 10 rounds standard OEM capacity
- Flush-fit profile maintains concealability
- Steel construction for enhanced durability over polymer magazines
- Patented staggered-round geometry maximizes capacity
- Drop-in installation with included steel mag catch
- Complete compatibility with Glock 43X and 48 models
- Competition-ready performance for USPSA, IDPA, and more
- All components designed and tested to work together perfectly
Why the Steel Mag Catch is Essential
The included steel magazine catch is required for proper S15 magazine function. The OEM plastic Glock mag catch is designed for lighter polymer magazines and will experience premature wear when used with steel S15 magazines. The Shield Arms steel mag catch provides:
- Proper engagement with S15 magazine geometry
- Eliminates wear from steel-on-plastic contact
- Ensures reliable magazine retention and drop-free operation
- Ambidextrous design for left and right-handed shooters
- Low-profile design ideal for concealed carry
- Black nitride finish for corrosion resistance
Spring for Life Guarantee
Every S15 magazine in this combo pack is backed by our exclusive "Spring for Life" guarantee. Magazine springs are wear items that can lose tension over time with heavy use. Our Spring for Life program ensures your S15 magazines maintain peak performance throughout their entire service life. Simply contact us when you need replacement springs, and we'll send them to you at no charge - for life.
Technical Specifications
| Compatible Models |
Glock 43X, Glock 48 (all generations) |
| Magazines Included |
3x S15 Gen 3 |
| Magazine Capacity |
15 rounds (9mm) |
| Mag Catch Included |
1x Standard Steel Mag Catch |
| Magazine Material |
Heat-treated steel |
| Magazine Finish |
QPQ Nitrocarburized (Nitrocarb) or Electroless Nickel |
| Mag Catch Material |
Steel with black nitride coating |
| Mag Catch Design |
Ambidextrous, low-profile |
| Profile |
Flush-fit (maintains OEM length) |
| Generation |
S15 Gen 3 (latest technology) |
| Warranty |
Lifetime + Spring for Life |
| Made In |
USA |
Capacity Comparison
| Configuration |
Rounds Per Magazine |
Total Capacity (3 Mags) |
| OEM Glock Magazines |
10 rounds |
30 rounds total |
| S15 Combo Pack 1 |
15 rounds |
45 rounds total |
| Advantage |
+5 rounds per mag (50% increase) |
+15 rounds total (50% increase) |
Professional Applications
- Concealed Carry: Maximum capacity without sacrificing concealability or comfort
- USPSA Carry Optics: Competition-legal 15-round capacity for stage planning advantages
- IDPA: Enhanced capacity where division rules permit
- Law Enforcement: Ideal for backup or off-duty carry with increased capacity
- Personal Defense: 50% more ammunition for home defense scenarios
- Training: Reduced reload frequency for more efficient practice sessions
Installation Guide
The S15 Combo Pack 1 includes everything needed for installation. The steel magazine catch can be installed in 5-10 minutes using basic tools:
- Ensure firearm is unloaded and cleared
- Remove existing OEM magazine catch per Glock instructions
- Install Shield Arms steel magazine catch
- Verify proper engagement with S15 magazines
- Function test with empty magazines before live fire
Complete installation instructions with photos and videos available at shieldarms.com/installation
Frequently Asked Questions
What's the difference between Combo Pack 1 and the S15 Starter Kit?
The S15 Starter Kit includes 1 magazine + 1 mag catch for those wanting to try the S15 system. Combo Pack 1 includes 3 magazines + 1 mag catch, providing enough magazines to fully outfit your carry setup with spares. Combo Pack 1 offers better value per magazine for those ready to fully commit to the S15 platform.
Do I need the steel mag catch, or can I use my OEM Glock mag catch?
The steel mag catch is required for proper S15 function and durability. The OEM plastic Glock mag catch will experience rapid wear when used with steel magazines and may result in reliability issues. The included steel mag catch prevents this wear and ensures proper magazine retention.
Will these magazines work in both Glock 43X and 48?
Yes, the S15 magazines are fully compatible with both Glock 43X and Glock 48 pistols, including all generation variants. The magazines are identical for both models.
Can I still use my OEM Glock magazines after installing the steel mag catch?
No. The Shield Arms steel mag catch is designed specifically for S15 magazine geometry and is not compatible with OEM Glock magazines. Once installed, you should use S15 magazines exclusively. If you need to return to OEM magazines, you'll need to reinstall the OEM mag catch.
How does the S15 maintain flush-fit with 50% more capacity?
The S15 uses a patented staggered-round geometry that efficiently arranges cartridges within the magazine body. Combined with steel construction that allows for thinner walls than polymer, this design achieves 15-round capacity in the same overall length as the 10-round OEM magazine.
What finish options are available for the magazines?
S15 magazines are available in multiple finishes: QPQ Nitrocarburized (Nitrocarb) matte black, Electroless Nickel Silver, and Electroless Nickel Black. Select your preferred finish when ordering the combo pack.
Is this combo pack legal in my state?
Magazine capacity restrictions vary by state and locality. The 15-round S15 magazines exceed capacity limits in some jurisdictions. Please check your local and state laws before purchasing. Shield Arms cannot ship to restricted locations.
How reliable are S15 magazines compared to OEM?
When used with the Shield Arms steel mag catch, S15 Gen 3 magazines offer reliability comparable to OEM Glock magazines. The Gen 3 improvements include enhanced manufacturing tolerances, refined follower design, and US-based production for consistent quality. Trusted by law enforcement and competitive shooters.
Can I add magazine extensions to increase capacity further?
Yes! Shield Arms offers +5 aluminum magazine extensions that increase S15 capacity to 20 rounds. These extensions are ideal for competition use or range training where concealability isn't a priority.
What is the Spring for Life guarantee?
Shield Arms provides free replacement magazine springs for life at no charge. Magazine springs can lose tension over time, and our Spring for Life program ensures your S15 magazines maintain peak performance forever. Learn more about Spring for Life.
Are there other combo pack options available?
Yes! Shield Arms offers S15 Combo Pack 2 which includes 3x magazines plus a +5 extension for competition use, and various other S15 bundles to meet different needs and budgets.
Who Should Buy S15 Combo Pack 1?
- New S15 adopters ready to fully transition to the high-capacity system
- Concealed carry permit holders wanting maximum capacity without bulk
- Competitive shooters in USPSA Carry Optics needing multiple match-ready magazines
- Law enforcement officers carrying Glock 43X/48 as backup or off-duty pistols
- Glock 43X/48 owners seeking the best value on complete capacity upgrade
- Training enthusiasts wanting multiple magazines to reduce reload frequency
- Anyone serious about maximizing their slim-frame Glock's potential
Why Choose Shield Arms?
Shield Arms revolutionized the Glock 43X/48 platform with the patented S15 magazine system. Every component undergoes rigorous testing and quality control to ensure it meets the demanding standards of professional users. Backed by our lifetime warranty, exclusive Spring for Life guarantee, and proudly Made in the USA, Shield Arms S15 Combo Pack 1 delivers unmatched value, performance, and peace of mind.
Upgrade your Glock 43X or 48 today - complete capacity enhancement, proven reliability, uncompromising performance.
