Quick Answer
What is the Glock 17+5 Pre-Installed Magazine? A complete, ready-to-use 22-round magazine featuring a genuine Glock OEM magazine body with Shield Arms +5 aluminum extension professionally installed and tested. No assembly required - just load and shoot. Compatible with Glock 17, 34, 19X, and 45.
Get maximum capacity right out of the box with the Shield Arms Glock 17+5 Pre-Installed Magazine Extension. This complete magazine solution combines a genuine Glock OEM magazine body with our precision-machined +5 aluminum extension, professionally assembled and tested by Shield Arms. Experience 22 rounds of 9mm capacity without any assembly, guesswork, or installation time.
Perfect for competitive shooters, law enforcement professionals, range enthusiasts, and anyone demanding reliable high-capacity magazines, this pre-installed magazine eliminates the need for DIY installation while ensuring professional-quality assembly and function testing.
Why Choose Pre-Installed?
While many shooters enjoy installing their own magazine extensions, the pre-installed option offers distinct advantages:
- Zero assembly time - ready to use immediately upon arrival
- Professional installation by Shield Arms technicians ensures optimal performance
- Pre-tested reliability - every magazine is function-tested before shipping
- Perfect for gifts - ready to use without requiring technical knowledge
- Guaranteed compatibility - assembled with matched components for flawless operation
- Eliminates installation errors - no risk of improper spring installation or misalignment
- Save time - get to the range or competition faster
Key Features
- 22-round total capacity: Genuine Glock 17 magazine (17 rounds) + 5 additional rounds
- Pre-installed and tested: Professionally assembled by Shield Arms, ready to use
- Genuine Glock OEM magazine body: Factory quality and reliability you trust
- Premium aluminum extension: CNC-machined from aircraft-grade 6061 aluminum
- Type-2 hard anodized finish: Durable black coating resists wear and corrosion
- 12-coil power spring included: Ensures reliable feeding at full 22-round capacity
- Tool-free floor plate access: Easy disassembly for cleaning and maintenance
- Index cuts for improved grip: Enhanced control during magazine changes
- Competition proven: Trusted in USPSA Production, Limited, and other divisions
- Professional grade: Meets the demands of law enforcement and competitive shooters
What's Included
- Genuine Glock OEM magazine body (17-round capacity)
- Shield Arms +5 aluminum extension (pre-installed)
- 12-coil high-performance spring (pre-installed)
- Premium magazine follower (pre-installed)
- Complete assembly - professionally installed and function tested
Spring for Life Guarantee
Every pre-installed magazine 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 magazine maintains peak performance throughout its entire service life. Simply contact us when you need a replacement spring, and we'll send you a new one at no charge - for life.
Technical Specifications
| Total Capacity |
22 rounds (9mm) |
| Base Magazine |
Genuine Glock OEM 17-round magazine |
| Capacity Increase |
+5 rounds (29% increase over standard) |
| Compatible Models |
Glock 17, 34, 19X, 45 (Gen 3, 4, 5) |
| Extension Material |
6061 Aluminum billet (CNC-machined) |
| Extension Finish |
Type-2 black hard anodized |
| Spring |
12-coil high-performance power spring |
| Floor Plate Access |
Tool-free disassembly |
| Assembly Status |
Pre-installed, tested, ready to use |
| Overall Length |
Approximately 1 inch longer than standard Glock 17 magazine |
| Weight (Empty) |
Lightweight aluminum construction |
| Warranty |
Lifetime + Spring for Life |
| Made In |
USA (Extension) / Austria or USA (Glock OEM Magazine) |
Capacity Comparison
| Magazine Configuration |
Capacity |
Advantage |
Best Use |
| Glock 17 Standard |
17 rounds |
Baseline |
Concealed carry, duty |
| Glock 17 +2 Extension |
19 rounds |
+2 rounds (12%) |
Slight capacity increase |
| Glock 17 +5 Pre-Installed |
22 rounds |
+5 rounds (29%) |
Competition, range, duty |
| Glock 17 33-Round Mag |
33 rounds |
+16 rounds (94%) |
Range use only (extended length) |
Compatible Glock Models
The Glock 17+5 pre-installed magazine is compatible with all standard 9mm Glock models that accept Glock 17 magazines:
Full-Size Models
- Glock 17 (Gen 3, 4, 5) - Standard full-size 9mm pistol
- Glock 34 (Gen 3, 4, 5, MOS) - Competition long-slide model
Crossover Models
- Glock 19X - Full-size frame with compact slide
- Glock 45 (Gen 5) - Full-size frame with compact slide, front rail
Additional Compatibility
- Compatible with Glock-pattern pistol caliber carbines (PCC) chambered in 9mm
- Works with most aftermarket Glock 17-compatible pistols
- Functions in firearms that accept standard Glock 17 magazines
Professional Applications
- USPSA Production Division: 22-round capacity provides strategic advantages in stage planning
- USPSA Limited Division: Maximum capacity for major or minor power factor
- 3-Gun Competition: Extended capacity reduces reload frequency during pistol stages
- Law Enforcement: Enhanced capacity for patrol duty or tactical applications
- Range Training: Fewer reloads mean more time shooting, less time loading
- Home Defense: Increased capacity provides peace of mind for defensive scenarios
- Competitive Training: Match-ready magazines for practice and competition
Maintenance & Care
The pre-installed magazine features tool-free floor plate access for easy maintenance:
- Disassembly: Press floor plate release and slide extension off magazine body
- Cleaning: Clean magazine body interior, spring, and follower as needed
- Inspection: Check spring for wear, follower for damage, feed lips for deformation
- Lubrication: Apply light lubrication to spring and follower (minimal - avoid over-lubing)
- Reassembly: Install spring, follower, and extension in reverse order
- Function Test: Verify proper feeding with dummy rounds before live fire
Maintenance Tip: If you notice reduced spring tension after heavy use, contact Shield Arms for a free replacement spring under our Spring for Life guarantee.
Frequently Asked Questions
Is this a genuine Glock magazine?
Yes, the magazine body is a genuine Glock OEM factory magazine. Shield Arms adds our precision-machined +5 aluminum extension to increase capacity from 17 to 22 rounds. You get factory Glock quality with Shield Arms enhanced capacity.
Can I buy just the extension and install it myself?
Yes! If you prefer DIY installation or already have Glock 17 magazines, you can purchase the +5 extension separately. The pre-installed option is for customers who want immediate use without assembly.
Will this work in my Glock 19?
The magazine will physically fit and function in a Glock 19, but it will extend significantly below the grip. This magazine is optimized for full-size Glock models (17, 34, 19X, 45) where the extension maintains proper proportion. For Glock 19, consider a Glock 19-specific magazine extension.
Is the 22-round capacity legal for competition?
Yes, in most divisions. USPSA Production Division allows up to 140mm magazine length (this qualifies). USPSA Limited allows unlimited capacity. IDPA has different capacity restrictions by division. Always verify current rules for your specific competition and division.
How reliable is the 22-round capacity?
Extremely reliable. Each pre-installed magazine is assembled with a matched 12-coil power spring designed specifically for the extended capacity, then function-tested before shipping. The combination of genuine Glock OEM magazine body and precision Shield Arms extension ensures reliable feeding through all 22 rounds.
Can I use this for concealed carry?
While functional, the extended length makes this magazine less ideal for concealed carry compared to standard-length magazines. It's best suited for competition, range use, duty carry in an external magazine pouch, or home defense where concealability isn't a priority.
What's the difference between this and buying a 33-round Glock magazine?
The 33-round magazine extends much further below the grip and is impractical for most uses except range training. The +5 extension provides a 29% capacity increase (22 vs 17 rounds) while maintaining manageable length - perfect for competition where the 33-round magazine would be prohibited or impractical.
How do I know if the magazine is functioning properly?
Each magazine is function-tested before shipping, but you should verify proper operation before live fire. Load dummy rounds to full capacity and check for smooth feeding, proper follower movement, and reliable presentation to the feed ramp. The magazine should lock back the slide on empty.
Can I disassemble the magazine for cleaning?
Yes! The Shield Arms extension features tool-free floor plate access. Simply press the release and slide the extension off the magazine body. This allows you to remove the spring and follower for cleaning and inspection. Reassembly is equally simple.
Is this magazine legal in my state?
Magazine capacity restrictions vary by state and locality. The 22-round capacity exceeds limits in several states. 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. If your spring loses tension from heavy use, contact us and we'll send a replacement spring at no cost. This ensures your magazine maintains peak performance forever. Learn more about Spring for Life.
Who Should Buy the Pre-Installed Magazine?
- Competitive shooters who need match-ready magazines without assembly time
- First-time extension buyers who prefer professional installation over DIY
- Gift buyers looking for ready-to-use presents for Glock owners
- Law enforcement agencies requiring reliable, tested magazines for duty issue
- Busy professionals who value convenience and guaranteed performance
- Anyone wanting peace of mind from professional assembly and function testing
- Shooters preparing for competition who need magazines ready for match day
- Training facilities requiring reliable, high-capacity magazines for courses
Pre-Installed vs. DIY Extension Kit
| Feature |
Pre-Installed Magazine |
DIY Extension Kit |
| Ready to Use |
✓ Immediate use upon arrival |
Requires installation (5-10 min) |
| Professional Assembly |
✓ Shield Arms technicians |
User installation |
| Pre-Tested |
✓ Function tested before shipping |
User testing required |
| Magazine Body Included |
✓ Genuine Glock OEM |
Must purchase separately |
| Assembly Required |
None |
✓ Yes (simple process) |
| Cost |
Higher (includes magazine + labor) |
✓ Lower (extension only) |
| Best For |
Convenience, gifts, guaranteed assembly |
DIY enthusiasts, existing magazines |
Why Choose Shield Arms?
Shield Arms has built a reputation for precision-engineered magazine accessories that enhance firearm performance without compromising reliability. The Glock 17+5 pre-installed magazine combines genuine Glock factory quality with Shield Arms manufacturing excellence, assembled by skilled technicians and function-tested to ensure flawless operation.
Backed by our lifetime warranty against manufacturing defects and exclusive Spring for Life guarantee, this pre-installed magazine delivers professional-grade performance with the convenience of ready-to-use assembly. Proudly featuring components Made in the USA, Shield Arms continues to set the standard for magazine enhancement solutions.
Order your Glock 17+5 pre-installed magazine today - maximum capacity, professional assembly, guaranteed performance, immediate use.
