Quick Answer
What is the S15 Magwell Combo 2? The ultimate complete upgrade bundle for Glock 43X/48 that includes 3x S15 Gen 3 15-round magazines, 1x +5 aluminum extension for 20-round capacity, 1x steel mag catch, and 1x carry magwell. This all-in-one package provides everything needed for maximum capacity and competition-ready reload speed at a significant savings over individual components.
Transform your Glock 43X or 48 into a high-capacity, competition-ready powerhouse with the Shield Arms S15 Magwell Combo 2. This comprehensive upgrade bundle combines three S15 Gen 3 15-round magazines, one +5 aluminum extension for 20-round capacity, the essential steel magazine catch, and a carry magwell - delivering everything needed for maximum performance at an exceptional value.
Perfect for competitive shooting, range training, home defense, and serious enthusiasts, this all-in-one package offers professional-grade components designed to work seamlessly together. Save significantly 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 +5 Magazine Extension: CNC-machined aluminum extension increases capacity to 20 rounds, includes 12-coil power spring
- 1x Standard Steel Mag Catch: Black nitride coated ambidextrous magazine catch required for S15 magazines
- 1x Carry Magwell: Black anodized aluminum magwell for faster, more consistent reloads
- Installation Hardware: All necessary components included
- Installation Instructions: Detailed guides available at Shield Arms Installation Page
Maximum Capacity Configuration
This combo provides the ultimate flexibility for different shooting applications:
- Concealed Carry: Use the three 15-round flush-fit magazines for maximum concealability
- Competition/Range: Install the +5 extension on one or more magazines for 20-round capacity
- Mix and Match: Configure magazines based on your specific needs - carry with flush-fit, compete with extended
S15 Gen 3 Magazine Features
The three included S15 Gen 3 magazines represent the pinnacle of Shield Arms engineering:
- 15-round capacity in factory magazine length (50% more than OEM 10-round)
- Patented staggered-round geometry maximizes capacity efficiency
- Enhanced steel construction with improved thickness and toughness
- US-based manufacturing for consistent quality control
- QPQ Nitrocarburized finish resists corrosion and wear
- Impact-resistant removable base pad for easy cleaning
- Raised ribs on magazine back for perfect OEM positioning
- Flush-fit profile maintains concealability
S15 +5 Magazine Extension
The included +5 extension transforms one S15 magazine into a 20-round powerhouse:
- Adds 5 rounds to S15 magazine for 20-round total capacity (100% increase over OEM)
- CNC-machined from 6061 aluminum billet for lightweight durability
- Type-2 black anodized finish matches factory Glock aesthetics
- 12-coil power spring included ensures reliable feeding at full capacity
- Tool-free floor plate access for easy maintenance and cleaning
- Index cuts provide improved grip during rapid magazine changes
- Compatible with Shield Arms Carry and Premium Magwells
- Fits most aftermarket flared magwells
- Works with S15 magazines only (not compatible with OEM magazines)
Steel Mag Catch - Required Component
Important: The included steel mag 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
- Drop-in installation in 5-10 minutes
Note: Once installed, the steel mag catch is not compatible with OEM Glock magazines. Use S15 magazines exclusively.
Shield Arms Carry Magwell
The included carry magwell dramatically improves reload speed while maintaining a low profile perfect for concealed carry and competition:
- Precision CNC-machined from aluminum with black anodized finish
- Streamlined design optimized for concealed carry
- Beveled opening guides magazines for faster, more consistent reloads
- Rounded edges eliminate hot spots and printing during AIWB carry
- Minimal profile addition maintains concealability
- Drop-in installation with included hardware
- Compatible with S15 magazines with or without +5 extension
- Fits most holsters designed for Glock 43X/48
Spring for Life Guarantee
Every S15 magazine and extension 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 and extensions 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 (Flush-Fit) |
15 rounds (9mm) |
| Magazine Capacity (With Extension) |
20 rounds (9mm) |
| Extension Included |
1x +5 Aluminum Extension |
| Mag Catch Included |
1x Standard Steel Mag Catch |
| Magwell Included |
1x Carry Magwell |
| Magazine Material |
Heat-treated steel |
| Magazine Finish |
QPQ Nitrocarburized (Nitrocarb) |
| Extension Material |
6061 Aluminum billet |
| Extension Finish |
Type-2 black anodized |
| Magwell Material |
Aluminum |
| Magwell Finish |
Black anodized |
| Mag Catch Material |
Steel with black nitride coating |
| Warranty |
Lifetime + Spring for Life |
| Made In |
USA |
Capacity Configurations
| Configuration |
Capacity Per Magazine |
Total Available Rounds |
Best Use |
| OEM Standard |
10 rounds |
30 rounds (3 mags) |
Factory configuration |
| S15 Flush-Fit |
15 rounds |
45 rounds (3 mags) |
Concealed carry, EDC |
| S15 + Extension |
20 rounds |
55 rounds (2 flush + 1 extended) |
Competition, range, home defense |
| Advantage |
+10 rounds (100%) |
+25 rounds (83%) |
Maximum flexibility |
Professional Applications
- USPSA Carry Optics: 20-round capacity with magwell provides competitive advantages in stage planning and reload speed
- IDPA Competition: 15-round flush-fit configuration where extended magazines aren't permitted
- 3-Gun Competition: Maximum capacity and fast reloads for pistol stages
- Range Training: Extended capacity reduces reload frequency for more efficient practice
- Home Defense: 20-round capacity provides maximum ammunition availability
- Concealed Carry: Use flush-fit magazines for EDC, keep extended magazine as backup
- Law Enforcement: Ideal for officers using Glock 43X/48 as backup or off-duty pistols
Installation
The S15 Magwell Combo 2 includes all components needed for complete installation. Complete installation instructions with photos and videos available at shieldarms.com/installation
Frequently Asked Questions
What makes this combo different from other S15 bundles?
The S15 Magwell Combo 2 is the most comprehensive upgrade package available, including magazines, extension, mag catch, AND a carry magwell. While Combo Pack 1 includes 3 magazines + mag catch, and Combo Pack 2 includes 3 magazines + extension, the Magwell Combo 2 adds the essential magwell for maximum performance and value.
Can I use the +5 extension on all three magazines?
The combo includes one +5 extension. You can purchase additional +5 extensions separately if you want to convert all three magazines to 20-round capacity. Most users prefer one extended magazine for competition/range with two flush-fit magazines for concealed carry.
Will the magwell affect concealed carry?
The Shield Arms Carry Magwell is specifically designed with a low-profile, streamlined design optimized for concealed carry. It adds minimal bulk while dramatically improving reload speed. The rounded edges prevent printing and hot spots during AIWB carry. Most concealed carry holsters accommodate the magwell.
Can I still use 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 must use S15 magazines exclusively. The three magazines included provide a complete replacement for OEM magazines.
How much does the magwell weigh?
The aluminum carry magwell adds minimal weight (approximately 0.7 oz) while providing significant performance benefits. The weight is negligible for most users and doesn't negatively affect carry comfort or pistol handling.
Is the 20-round configuration legal for competition?
It depends on the division. USPSA Carry Optics and Limited divisions allow the 20-round configuration. IDPA and some other divisions have capacity restrictions. Always verify current rules for your specific competition division and local laws.
Can I install the extension myself?
Yes! The +5 extension installation is straightforward and requires no special tools. Simply remove the S15 base pad, replace the spring with the included 12-coil spring, and install the extension body. Most users complete installation in 2-3 minutes per magazine. Detailed instructions included.
What's the difference between the Carry Magwell and Premium Magwell?
The Carry Magwell (included in this combo) features a low-profile design optimized for concealed carry with minimal bulk. The Premium Magwell has a more aggressive flare and larger opening optimized purely for competition reload speed. Most users prefer the Carry Magwell for its versatility.
How reliable is the 20-round configuration?
When properly installed with the included 12-coil power spring, the +5 extension provides reliable feeding through all 20 rounds. The extension has been extensively tested and is trusted by competitive shooters nationwide. Always function-test with dummy rounds before live fire.
Is this combo legal in my state?
Magazine capacity restrictions vary by state and locality. The 15-round and 20-round configurations exceed capacity limits in some jurisdictions. Please check your local and state laws before purchasing. Shield Arms cannot ship to restricted locations.
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 and extensions maintain peak performance forever. Learn more about Spring for Life.
Who Should Buy S15 Magwell Combo 2?
- Competitive shooters in USPSA, IDPA, or 3-Gun seeking maximum capacity and reload speed advantages
- Serious Glock 43X/48 enthusiasts ready to fully optimize their pistol's performance
- Range training devotees wanting extended capacity and faster reloads for efficient practice
- Home defense users prioritizing maximum ammunition capacity and quick reload capability
- Anyone seeking maximum value - this combo saves $91 (37%) versus buying components separately
- Shooters wanting flexibility to configure magazines for both concealed carry and competition use
- Law enforcement officers using Glock 43X/48 who need both carry and competition configurations
Why Choose Shield Arms?
Shield Arms revolutionized the Glock 43X/48 platform with the patented S15 magazine system and continues to innovate with performance-enhancing accessories. Every component undergoes rigorous testing and quality control to ensure it meets the demanding standards of professional users.
The S15 Magwell Combo 2 represents the ultimate value in complete Glock 43X/48 upgrades - backed by our lifetime warranty, exclusive Spring for Life guarantee, and proudly Made in the USA. Save $91 while getting everything you need for maximum capacity and performance.
Transform your Glock 43X or 48 today - complete capacity enhancement, competition-ready reload speed, uncompromising performance, exceptional value.
