What is the Glock 19 +5 Pre-Installed Magazine Extension?
An OEM Glock 19 15-round magazine with Shield Arms' premium +5 magazine extension already professionally installed. Increases capacity from 15 to 20 rounds. Features Type-2 anodized aluminum construction, easy-access floor plate for maintenance, index cuts for improved grip, and includes upgraded +10% power spring. USPSA compliant, fits most aftermarket magwells. Ready to use out of the box - no installation required.
- Instant Capacity Upgrade: 20 rounds total (15+5) - professionally installed and tested
- Premium Construction: Billet 6061 aluminum with Type-2 anodizing in multiple colors
- No Gunsmithing: Ships ready to use - skip the installation process entirely
Maximum Capacity Without Compromise - Pre-Installed Convenience
The Shield Arms Glock 19 +5 Pre-Installed Magazine Extension combines an authentic OEM Glock 19 magazine with Shield Arms' premium aluminum magazine extension - professionally installed, tested, and ready to use. This turnkey solution provides 20-round capacity (15+5) without the hassle of purchasing components separately or wrestling with installation.
Unlike cheap polymer extensions that crack under stress or require difficult installation, Shield Arms magazine extensions are precision-machined from billet 6061 aluminum with Type-2 anodizing for exceptional durability. The unique easy-access floor plate design allows maintenance without removing the extension, while index cuts provide positive grip when drawing from magazine pouches.
Each pre-installed magazine includes an upgraded +10% power spring for reliable feeding with the extended capacity. The extension is USPSA 141.25 gauge compliant for competition use and fits most aftermarket flared magwells including Shield Arms Carry and Premium Magwells.
Perfect for: Competition shooters (USPSA, IDPA, 3-Gun), home defense, duty carry, range training, and anyone who wants maximum Glock 19 capacity without installation hassle.
Why Choose Pre-Installed Over Separate Components?
Convenience & Time Savings
- Professional installation - correctly installed by Shield Arms before shipping
- Skip the installation process - no tools, no frustration, no learning curve
- Function tested - verified to work properly before leaving the factory
- Ready to load immediately - unwrap, load ammunition, and shoot
- Perfect gift option - arrives complete and ready for the recipient
Guaranteed Compatibility
- OEM Glock magazine confirmed - genuine factory Glock 19 magazine included
- Proper spring tension - +10% power spring correctly installed and tested
- Correct assembly - no risk of improper installation causing malfunctions
- Quality control - inspected before shipment to ensure reliability
Value Proposition
- Save time and effort - avoid 15-30 minutes of installation per magazine
- No risk of damage - professional installation prevents scratching or bending components
- Immediate availability - start using right away instead of waiting for installation
- Bundle pricing - competitive pricing compared to buying components separately
Premium Magazine Extension Features
Superior Material & Construction
- Billet 6061 aluminum - aerospace-grade material, far stronger than polymer
- Type-2 anodized finish - exceptional wear resistance and corrosion protection
- Precision CNC machined - tight tolerances for perfect fit and function
- Lightweight design - adds capacity without excessive weight
- Durable construction - withstands repeated drops on hard surfaces
- Won't crack or break - unlike polymer extensions that fail under stress
Innovative Easy-Access Floor Plate
- Service without removal - unique design allows maintenance while extension stays installed
- Quick disassembly - easier cleaning and spring replacement when needed
- No special tools required - simple disassembly process
- Maintains extension integrity - avoid repeated installation/removal wear
- Patent-pending design - exclusive Shield Arms innovation
Enhanced Ergonomics & Grip
- Index cuts on front and rear - positive tactile reference points
- Improved magazine draws - easier extraction from pouches and carriers
- Enhanced grip texture - maintain control during reloads
- Smooth edges - won't snag on clothing or gear
- Comfortable in hand - extended length provides better purchase during reloads
Performance Enhancements
- +10% power spring included - stronger spring for reliable feeding with extended capacity
- Adds +5 rounds capacity - increases Glock 19 from 15 to 20 rounds total
- USPSA 141.25 gauge compliant - legal for Production and Limited divisions
- Reliable feeding - tested with various ammunition types and bullet profiles
- Maintains reliability - no compromise in function for increased capacity
Competition & Magwell Compatibility
- USPSA Production legal - fits within 141.25mm maximum magazine length
- Shield Arms Carry Magwell compatible - Gen 5 Glock 19/23/44
- Shield Arms Premium Magwell compatible - Gen 5 Glock 19/23/44
- Most aftermarket flared magwells - compatible with popular brands
- Factory magwell compatible - works with standard Glock frame
Multiple Color Options
Type-2 anodized finish available in multiple colors to match your setup or personal preference. Color options may include:
- Black - classic tactical appearance, matches most setups
- Red - high visibility for competition or training identification
- Blue - distinctive appearance, popular for competition
- Gold/Bronze - premium aesthetic, stands out at the range
- Gray/Silver - neutral tone, professional appearance
*Color availability may vary. Select your preferred color during checkout.
Technical Specifications
| Product Name |
Glock 19 +5 Pre-Installed Magazine Extension |
| Magazine Included |
OEM Glock 19 15-round (9mm) |
| Extension Brand |
Shield Arms |
| Model |
Glock 19/23 +5/4 Magazine Extension |
| Installation Status |
Pre-installed (ready to use) |
| Total Capacity |
20 rounds (15+5) |
| Capacity Increase |
+5 rounds for Glock 19 (9mm) |
| Material |
Billet 6061 Aluminum |
| Finish |
Type-2 Anodized |
| Color Options |
Multiple (Black, Red, Blue, Gold, Gray - availability varies) |
| Floor Plate Design |
Easy-access (service without extension removal) |
| Index Cuts |
Yes (front and rear for improved grip) |
| Spring Included |
+10% Power Spring (stronger than OEM) |
| USPSA Compliance |
Yes (141.25mm gauge compliant) |
| Competition Legal |
USPSA Production, Limited, Carry Optics divisions |
| Magwell Compatibility |
Shield Arms Carry & Premium Magwells (Gen 5 G19/23/44) |
| Aftermarket Magwell |
Fits most flared magwells |
| Magazine Type |
OEM Glock only (not compatible with aftermarket magazines) |
| Caliber |
9mm (Glock 19) |
| Glock Models |
Glock 19 (Gen 3, 4, 5) - OEM magazines |
| Weight Added |
Minimal (aluminum construction) |
| Durability |
Extreme (aluminum far stronger than polymer) |
| Made In |
USA |
| Warranty |
Lifetime (Shield Arms magazine extension) |
Why Aluminum Over Polymer Extensions?
| Feature |
Shield Arms Aluminum |
Typical Polymer Extension |
| Material Strength |
Billet 6061 aluminum (aerospace-grade) |
Polymer/plastic (can crack or break) |
| Drop Resistance |
Withstands repeated concrete drops |
Cracks or breaks on hard surfaces |
| Wear Resistance |
Type-2 anodizing (exceptional durability) |
Scratches easily, finish wears quickly |
| Longevity |
Decades of use without degradation |
Degrades over time, UV sensitive |
| Impact Strength |
Dent resistant, maintains integrity |
Cracks on impact, catastrophic failure |
| Temperature Range |
Extreme cold to hot without issues |
Brittle in cold, soft in heat |
| Floor Plate Design |
Easy-access (service without removal) |
Usually requires full removal to service |
| Weight |
Lightweight despite strength |
Slightly lighter but far less durable |
| Finish Options |
Multiple anodized colors available |
Usually only black or limited colors |
| Professional Appearance |
Premium, machined aesthetic |
Basic plastic look |
| Warranty |
Lifetime |
Limited or no warranty |
Use Cases & Applications
Perfect For:
USPSA/IDPA Competition - Maximum legal capacity for Production division. Index cuts and extended length improve reload speed. Reliable feeding critical for match performance. Type-2 anodizing withstands thousands of competition reloads. Color options help identify magazine types quickly.
3-Gun & Multi-Gun Competition - Extra 5 rounds provide advantage in pistol-heavy stages. Durable aluminum construction survives being dropped during stage runs. Fast reloads when transitioning between targets. Professional appearance matches competition-level equipment.
Home Defense - Increased capacity from 15 to 20 rounds provides additional margin of safety. Reliable feeding ensures function when it matters most. Durable construction means magazine won't fail in storage. Easy-access floor plate simplifies annual maintenance checks.
Duty/Professional Carry - Extra capacity without excessive length increase. Durable aluminum withstands daily duty use. Reliable feeding in critical situations. Compatible with duty magwells. Professional appearance appropriate for law enforcement.
Range Training - Fewer reloads means more time shooting, less time loading. Practice with competition-legal capacity. Durable construction survives being dropped on concrete range floors. Index cuts make magazine manipulation practice easier.
Firearms Instruction - Extended magazines allow longer strings of fire for student practice. Fewer interruptions for reloading during instruction. Durable enough for rental gun use. Easy-access floor plate simplifies cleaning between rental customers.
Backup/Spare Magazines - Pre-installed convenience means spares are ready immediately. Match your primary magazines for consistency. Color-coded options help organize magazine rotation. Quality construction ensures long-term reliability in storage.
Installation vs. Pre-Installed - Time & Effort Savings
What You Avoid with Pre-Installed
- 5 minutes installation time - per magazine, multiply by number of magazines needed
- Removing factory floor plate - can be stubborn and require special tools
- Controlling spring tension - springs can fly across room if not careful
- Correctly orienting components - easy to install backwards or incorrectly
- Ensuring proper seating - critical for reliability, difficult to verify
- Scratching magazine body - risk of cosmetic or functional damage
- Lost small parts - floor plate retaining pin can disappear easily
- Learning curve - first installation always takes longer
- Tools required - may need punch, padded vise, or special tools
What You Gain with Pre-Installed
- Immediate use - unwrap, load, shoot the same day
- Professional installation - correct orientation and seating guaranteed
- Factory quality control - inspected before shipping
- No risk of damage - avoid scratching your new extension or magazine
- Perfect gift - arrives complete and ready for recipient
- Peace of mind - know it's installed correctly from the start
- Consistent results - all magazines assembled to same standard
Frequently Asked Questions
Is this a real Glock magazine or aftermarket?
This includes an authentic OEM Glock 19 15-round magazine - genuine Glock factory production, not aftermarket. The magazine extension is Shield Arms (aftermarket), but the magazine itself is 100% genuine Glock OEM. This ensures maximum reliability and compatibility.
Can I install this extension on magazines I already own?
Yes, but this product is the magazine WITH extension pre-installed for convenience. If you want to install extensions on your existing magazines, purchase the Shield Arms Glock 19/23 +5/4 Magazine Extension separately. The pre-installed option saves you installation time and ensures correct assembly.
Will this fit in my Glock 19 magwell?
Yes. The extension is specifically designed to fit Shield Arms Carry and Premium Magwells for Gen 5 Glock 19/23/44, and also fits most aftermarket flared magwells. It works with factory Glock frames without magwells as well. If you have a specific magwell brand, contact Shield Arms to confirm compatibility.
Is this legal for USPSA Production division?
Yes. The Shield Arms +5 extension is USPSA 141.25mm gauge compliant, making it legal for Production, Carry Optics, and Limited divisions. The 20-round total capacity (15+5) is within USPSA rules. Always verify current rulebook as competition rules can change.
Why aluminum instead of polymer extensions?
Aluminum is dramatically stronger and more durable than polymer. Polymer extensions can crack when dropped on concrete or fail under stress. The Shield Arms billet 6061 aluminum construction withstands repeated drops and harsh use without cracking. Type-2 anodizing provides superior wear resistance. Aluminum lasts decades while polymer may need replacement after hard use.
What does "easy-access floor plate" mean?
Shield Arms' unique design allows you to disassemble the magazine for cleaning or maintenance WITHOUT removing the entire extension. Traditional extensions require complete removal to access the spring and follower. This innovation saves time and reduces wear on components from repeated installation/removal cycles.
Will this work with my Glock 17 magazines?
No. This is specifically for Glock 19 OEM magazines. Glock 17 magazines are longer and require different extensions. Shield Arms makes separate extensions for Glock 17 if you need that size. The pre-installed product comes with a Glock 19 magazine specifically.
What is the "+10% power spring" and why is it included?
The +10% power spring is 10% stronger than the OEM Glock magazine spring. When you add 5 rounds of capacity, the spring must push more rounds through the magazine body. The stronger spring ensures reliable feeding even when fully loaded to 20 rounds. This prevents failures to feed that can occur with OEM springs in extended magazines.
Can I mix these with my standard 15-round magazines?
Yes. Many shooters use extended magazines for competition or home defense while keeping standard 15-round magazines for concealed carry. The magazines are interchangeable in your Glock 19. Some shooters color-code their extended magazines (using different anodized colors) to quickly identify capacity.
Will this extension stick out below my grip?
Yes. The +5 extension adds approximately 3/4" to 1" of length beyond the standard Glock 19 grip. This provides 5 additional rounds and gives more surface area for improved reloads. The extended length is beneficial for competition and doesn't interfere with holster use (depending on holster design).
Does this work with hollow point ammunition?
Yes. The +10% power spring and OEM Glock magazine body ensure reliable feeding with hollow points, FMJ, and other bullet profiles. Shield Arms tests extensions with various ammunition types. However, always function-test your specific carry ammunition in your firearm with these magazines before relying on them.
What's the warranty on this product?
Shield Arms backs the magazine extension with a lifetime warranty against manufacturing defects. The OEM Glock magazine carries Glock's standard warranty. If you experience any issues with the Shield Arms extension, contact Shield Arms customer service for warranty support.
Can I choose what color extension I receive?
Yes, color selection is available during checkout (subject to availability). Options typically include Black, Red, Blue, Gold/Bronze, and Gray/Silver. Black is most popular for duty/carry use, while color options are popular for competition (helps identify magazine types quickly) or personal preference.
Will this work in my Glock 19X or Glock 45?
No, the Glock 19X and Glock 45 accept a Glock 17 length magazine.
Who Should Buy This Product?
- USPSA/IDPA Competitors - Need maximum legal capacity for Production/Carry Optics divisions
- 3-Gun Shooters - Want extra capacity for pistol stages without reliability compromise
- Home Defense Users - Appreciate increased capacity for defensive scenarios
- Glock 19 Owners - Want to maximize capacity of their primary carry/duty pistol
- Convenience Seekers - Don't want to deal with installing extensions themselves
- Gift Buyers - Perfect ready-to-use gift for Glock 19 owners
- Range Enthusiasts - Fewer reloads means more shooting, less magazine loading
- New Competitors - Starting competition shooting and need compliant high-capacity magazines
- Magazine Collectors - Building collection of different capacity options
- Backup/Spare Needs - Want additional magazines ready to go immediately
- Quality-Conscious Buyers - Refuse to use cheap polymer extensions that crack
- Training Instructors - Need reliable extended magazines for student rental guns
Summary: Is the Pre-Installed Magazine Extension Right for You?
The Shield Arms Glock 19 +5 Pre-Installed Magazine Extension provides the ultimate convenience for Glock 19 owners who want maximum capacity without installation hassle. By combining an authentic OEM Glock 19 magazine with Shield Arms' premium aluminum extension - professionally installed and function tested - this product is ready to use immediately.
Key Advantages:
- Genuine OEM Glock 19 magazine included - not aftermarket
- Shield Arms premium aluminum extension pre-installed professionally
- 20-round total capacity (15+5) - maximum capacity increase
- Billet 6061 aluminum with Type-2 anodizing - far stronger than polymer
- Easy-access floor plate - service without extension removal
- Index cuts for improved grip - faster magazine manipulation
- +10% power spring included - ensures reliable feeding at full capacity
- USPSA 141.25mm gauge compliant - legal for competition
- Multiple color options available - match your setup or preference
- Ready to use immediately - no installation required
- Made in USA with lifetime warranty on extension
Perfect for: Competition shooters who need USPSA-legal capacity,home defenders who want maximum capacity, range enthusiasts who prefer fewer reloads, and anyone who values convenience and wants to skip the installation process entirely.
Why Pre-Installed Over DIY: Professional installation ensures correct assembly, saves 15-30 minutes per magazine, eliminates risk of installation damage, provides immediate usability, and offers peace of mind that it's done right. The pre-installed option is perfect for those who value their time, want guaranteed compatibility, or are purchasing as a gift.
Why Aluminum Over Polymer: Billet 6061 aluminum withstands drops on concrete without cracking, Type-2 anodizing provides exceptional wear resistance, material won't degrade over time like polymer, and the easy-access floor plate design is only possible with precision-machined aluminum construction. This is a buy-once investment that will last decades.
Competition Use: USPSA 141.25mm gauge compliant for Production, Carry Optics, and Limited divisions. The 20-round capacity provides competitive advantage while remaining legal. Index cuts aid fast reloads. Proven reliability means no costly malfunctions during matches. Compatible with Shield Arms magwells for maximum reload speed.
Ready to maximize your Glock 19 capacity? Select your preferred anodized color and add this pre-installed magazine to your cart. It arrives ready to load and shoot - no tools, no installation, no hassle. Just unwrap, load your ammunition, and experience 20-round capacity immediately.
Need multiple magazines? Most shooters prefer having at least 5-6 magazines for competition or training. Consider purchasing multiple pre-installed magazines to outfit your Glock 19 completely. Different colors can help identify magazine rotation or separate competition magazines from carry magazines.
Questions before ordering? Contact Shield Arms customer service for expert guidance on magazine extensions, color selection, magwell compatibility, competition legality, or any other questions about this premium pre-installed magazine solution.
