What is the Shield Arms S15 Combo Pack 3?
The S15 Combo Pack 3 is Shield Arms' ultimate competition or carry package for Glock 43X and 48 pistols, featuring three S15 Gen 3 magazines and two +5 magazine extensions. This kit allows shooters to configure two magazines at 20-round capacity while maintaining one standard 15-round magazine for versatile applications.
What's included:
- 3x S15 Gen 3 Magazines (15-round capacity each)
- 2x Anodized +5 Magazine Extensions with complete hardware
- Detailed installation instructions
Enhance your setup with:
Ultimate Competition Capacity for Glock 43X/48
The Shield Arms S15 Combo Pack 3 represents the pinnacle of magazine capacity enhancement for competitive Glock 43X and 48 shooters. This comprehensive kit provides everything needed to maximize your firearm's performance in competition environments, delivering two extended 20-round magazines while retaining the flexibility of a standard 15-round magazine for backup or concealed carry applications. Each component is precision-manufactured in the USA from premium materials, ensuring the reliability demanded by serious competitors.
Unlike standard Glock factory magazines limited to 10 rounds, the S15 uses a patented steel magazine body with a double-stack configuration to achieve 15 rounds in the same overall footprint. Add the included +5 extensions to two of these magazines, and you have 20-round capacity that transforms the compact Glock 43X/48 platform into a competition powerhouse. The third magazine remains at standard 15-round capacity, perfect for stages requiring concealment holsters or as a reliable backup option.
This combo pack is specifically designed for competitive shooters participating in USPSA Carry Optics, IDPA, and similar divisions where maximizing capacity within equipment rules provides a significant advantage. With two 20-round magazines available, you'll complete most competition stages with minimal reloads, maintaining momentum and reducing time penalties. The Gen 3 S15 magazines incorporate the latest engineering improvements based on extensive testing and competitor feedback, delivering enhanced reliability under the stress of competition conditions.
S15 Gen 3 Magazine Improvements
The S15 Gen 3 magazines included in Combo Pack 3 feature significant improvements over previous generations:
- Enhanced follower design with optimized geometry for improved feeding reliability across all ammunition types
- Refined spring system with improved geometry for consistent performance and reduced wear
- Tighter manufacturing tolerances ensuring better consistency between magazines
- Optimized feed lip geometry for reliable feeding even under rapid-fire conditions
- Improved heat-treated steel construction for enhanced durability and longevity
- Better performance under stress with competition-proven reliability in high round count scenarios
Key Features
- Dual 20-Round Configuration: Two magazines equipped with +5 extensions for maximum 20-round capacity
- Three Gen 3 S15 Magazines: Latest generation technology with enhanced reliability improvements
- Two Anodized +5 Extensions: Hard anodized aluminum construction for superior durability and corrosion resistance
- Flexible Setup Options: Configure magazines based on match requirements and stage design
- Competition Optimized: Designed specifically for serious competitive shooting applications
- Complete Hardware Included: Everything needed to install both extensions with detailed instructions
- Precision CNC Manufacturing: Tight tolerances ensure reliable feeding and consistent performance
- Heat-Treated Steel Bodies: Superior strength and durability compared to polymer OEM magazines
Important Compatibility Notes
Required Component: S15 magazines require the Shield Arms steel magazine catch for proper function and reliability. The factory Glock plastic magazine catch is not compatible with steel S15 magazines.
Magazine Extensions: Looking for different capacity options? Consider the S15 +2 Extension for 17-round capacity or the S15 +5 Extension available separately.
Made in USA with Lifetime Warranty
Every component in the S15 Combo Pack 3 is proudly manufactured in the United States using premium materials and precision CNC machining. Shield Arms backs these magazines with a 100% lifetime warranty and our exclusive "Spring for Life" guarantee, ensuring your investment is protected for the life of your firearm. If you ever experience issues with magazine springs, Shield Arms will replace them free of charge—no questions asked.
Technical Specifications
| Specification |
Details |
| Package Contents |
3x S15 Gen 3 Magazines, 2x +5 Extensions with hardware |
| Standard Magazine Capacity |
15 rounds (9mm) |
| Extended Magazine Capacity |
20 rounds (with +5 extension installed) |
| Compatible Models |
Glock 43X, Glock 48 (all generations) |
| Magazine Material |
Heat-treated steel with nickel-boron coating |
| Extension Material |
CNC-machined aluminum with hard anodized finish |
| Extension Finish |
Black anodized (corrosion-resistant) |
| Magazine Generation |
Gen 3 (latest technology) |
| Caliber |
9mm |
| Manufacturing |
Made in USA |
| Warranty |
Lifetime warranty with Spring for Life guarantee |
| Required Accessory |
Shield Arms steel magazine catch (sold separately) |
S15 vs. Factory Glock Magazines
| Feature |
Shield Arms S15 (Standard) |
S15 with +5 Extension |
Factory Glock Magazine |
| Capacity |
15 rounds |
20 rounds |
10 rounds |
| Material |
Heat-treated steel |
Steel body, aluminum extension |
Polymer |
| Stack Configuration |
True double-stack |
True double-stack |
Single-stack |
| Overall Width |
Same as factory |
Same as factory |
Standard |
| Competition Suitability |
Excellent |
Superior |
Limited by capacity |
| Durability |
Steel construction |
Steel construction |
Polymer construction |
| Warranty |
Lifetime with Spring for Life |
Lifetime with Spring for Life |
Limited manufacturer warranty |
Frequently Asked Questions
Do S15 magazines require any modifications to my Glock 43X or 48?
Yes, S15 magazines require the Shield Arms steel magazine catch for proper function. The factory Glock plastic magazine catch is not compatible with the steel S15 magazine bodies and must be replaced. The steel magazine catch installs easily and is available separately from Shield Arms. No other modifications to your firearm are required.
Can I use the +5 extensions on all three magazines?
The Combo Pack 3 includes only two +5 extensions, designed to create two 20-round competition magazines while keeping one at standard 15-round capacity. This configuration is ideal for competitive shooting where you want maximum capacity for match stages but may need a shorter magazine for backup or concealed carry applications. Additional extensions can be purchased separately if desired.
Are S15 magazines legal in all states?
Magazine capacity laws vary by state and locality. Some jurisdictions restrict magazine capacity to 10 rounds or less. It is the buyer's responsibility to ensure compliance with all applicable federal, state, and local laws before purchasing. Shield Arms does not ship high-capacity magazines to restricted jurisdictions.
How difficult is it to install the +5 extensions?
Installing the +5 magazine extensions is straightforward and can be completed in minutes with included allen wrenches. Shield Arms provides detailed step-by-step instructions and video tutorials on our installation guides page. The process involves disassembling the magazine, installing the extended spring, and attaching the extension baseplate. Most users complete installation in 2-3 minutes per magazine.
Can I use S15 magazines for concealed carry?
Absolutely. The standard 15-round S15 magazines maintain the same compact profile as factory Glock magazines, making them excellent for concealed carry while providing 50% more capacity. The included third magazine without extension is perfect for everyday carry. The extended 20-round magazines are better suited as a backup mag, range use, or home defense applications where concealment is less critical.
How does the S15 Combo Pack 3 compare to buying magazines and extensions separately?
The Combo Pack 3 provides significant value compared to purchasing components individually. This package includes three Gen 3 magazines and two extensions at a bundled price, offering the optimal configuration for competitive shooters who want maximum capacity without buying more extensions than needed. It's the most cost-effective way to set up a competition-ready magazine loadout.
What is the "Spring for Life" guarantee?
Shield Arms' exclusive "Spring for Life" guarantee means we'll replace magazine springs free of charge for the life of your magazines, no questions asked. Magazine springs naturally wear over time with use, and this guarantee ensures your S15 magazines maintain optimal performance indefinitely. Simply contact Shield Arms if you experience any spring-related issues.
How many rounds should I expect to get through these magazines before needing maintenance?
S15 Gen 3 magazines are designed for extended service life with minimal maintenance. Many competitive shooters report thousands of rounds through their S15 magazines without issues. Regular cleaning and inspection after high-volume shooting sessions will maximize longevity. The heat-treated steel construction is significantly more durable than polymer alternatives, and the Spring for Life guarantee ensures long-term reliability even with heavy competition use.
Can I disassemble S15 magazines for cleaning?
Yes, S15 magazines can be fully disassembled for cleaning and maintenance. The magazines feature a removable baseplate that allows access to internal components. Regular cleaning is recommended after extended shooting sessions or exposure to dirt and debris. Detailed disassembly and maintenance instructions are available on our installation guides page.
Who Should Buy the S15 Combo Pack 3
- Competitive Shooters: USPSA, IDPA, and IPSC competitors who need maximum capacity for match stages
- Serious Competitors: Shooters who regularly compete and want the optimal magazine setup for their Glock 43X/48
- High-Volume Trainers: Shooters who engage in frequent training and want extended capacity for longer practice sessions
- Carry Optics Division Shooters: Competitors specifically shooting USPSA Carry Optics who want maximum capacity within division rules
- Performance Enthusiasts: Glock 43X/48 owners who want to maximize their pistol's performance potential
- Tactical Training Participants: Those enrolled in advanced shooting courses where capacity provides training advantages
- Value-Conscious Buyers: Shooters who want the best price on a complete dual-extension magazine setup
- Backup Magazine Users: Competitors who want extended magazines for stages plus a standard-capacity backup
Installation and Setup
Installing the +5 magazine extensions on your S15 magazines is a straightforward process that most shooters complete in minutes. Each extension kit includes all necessary hardware and detailed instructions. Shield Arms provides comprehensive installation guides, including step-by-step written instructions and video demonstrations, to ensure proper installation and function. After installation, thorough function testing is recommended before using extended magazines in competition. Visit our installation guides page for complete instructions and video tutorials.
Enhance Your Competition Setup
Recommended accessories to pair with your S15 Combo Pack 3:
- Premium Magwell for Glock 43X/48: Maximize reload speed with a competition-grade magwell that provides a larger opening and faster magazine insertion
- Carry Magwell for Glock 43X/48: Add reload speed advantages while maintaining a lower-profile design suitable for concealed carry applications
- S15 +2 Extension: Consider adding a +2 extension to your third magazine for 17-round capacity as an alternative to the standard 15-round configuration
- Additional S15 +5 Extensions: Purchase an additional +5 extension to maximize all three magazines to 20-round capacity for dedicated competition use
- Shield Arms Steel Magazine Catch (Required): Essential component for S15 magazine function—replace your factory Glock plastic magazine catch with this steel version
Competition Performance Advantages
The S15 Combo Pack 3 delivers measurable competitive advantages that translate to better match performance. With two 20-round magazines, most USPSA and IPSC stages can be completed with minimal or no reloads, maintaining momentum and reducing time lost to magazine changes. The extended capacity allows aggressive stage planning, enabling shooters to engage targets continuously without capacity management concerns. Gen 3 reliability improvements ensure consistent feeding even during rapid-fire strings, while the heat-treated steel construction withstands the rigors of high round count competition seasons. Championship-level shooters trust Shield Arms magazines for their proven performance when match results matter most.
Setup Recommendations for Competition
Primary Competition Configuration: Install the +5 extensions on two magazines for maximum 20-round capacity. Mark these magazines clearly and designate them as your primary match magazines for stages requiring maximum capacity.
Backup Standard Magazine: Keep the third magazine at standard 15-round capacity. This magazine serves as an excellent backup option and can be used for stages with specific equipment requirements or as a concealed carry magazine when traveling to and from matches.
Pre-Match Preparation: Before each competition, clean and inspect all magazines, verify spring tension, and conduct function testing with your match ammunition. Load each extended magazine to full capacity and cycle through several dummy rounds to ensure reliable feeding.
Break-In Period: New magazines may benefit from a brief break-in period. Load magazines to full capacity and let them sit overnight, then cycle through 50-100 rounds during practice to ensure all components are properly seated and functioning optimally.
Order Your S15 Combo Pack 3 Today
The Shield Arms S15 Combo Pack 3 represents the ultimate magazine solution for competitive Glock 43X and 48 shooters who demand maximum performance. With three Gen 3 S15 magazines and two +5 extensions, this kit provides everything needed to dominate the competition with 20-round capacity where it counts. Backed by our lifetime warranty and Spring for Life guarantee, your investment is protected for the life of your firearm. Made in the USA with precision CNC manufacturing and premium materials, Shield Arms magazines deliver the reliability champions demand. Configure your competition setup today and experience the capacity advantage that winning shooters trust.
