10 Best Glock 21 Holster

I’ve identified the top Glock 21 holsters based on retention systems, material quality, and user feedback. POLE.CRAFT’s IWB Kydex holster leads with 4.6-star ratings and adjustable 0-15° cant, while Amberide offers 0-30° adjustability in twelve colors. For OWB carry, CYTAC provides Level II retention with military-grade polymer construction. Blade-Tech and Blackhawk SERPA deliver reliable active retention systems with lifetime warranties. Each features .08″ waterproof Kydex construction and Posi-Click audible locks for secure carry. Understanding these specifications helps you choose the best configuration for your specific needs.

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Notable Insights

• POLE.CRAFT IWB Kydex Holster offers 4.6-star rating, adjustable cant 0-15°, and lifetime warranty for Glock 21 models.
• Amberide IWB provides 0-30° cant adjustment, 12 color options, and .08″ Kydex construction with lifetime warranty coverage.
• CYTAC OWB features Level II retention with automatic trigger lock and military-grade polymer for enhanced security.
• Blade-Tech OWB delivers high-strength polymer construction, adjustable retention, and versatile mounting system with lifetime warranty.
• Blackhawk SERPA utilizes active retention technology with Auto-Lock system for secure carry and quick draw accessibility.

POLE.CRAFT IWB Kydex Holster for Glock 20/21/22

The POLE.CRAFT IWB Kydex Holster stands out as the best choice for Glock 21 owners who prioritize versatility and precise retention control. This holster fits Glock 20/21/22 models across generations 3, 4, and 5. You’ll appreciate the .08″ Kydex construction that delivers waterproof, sweat-proof durability without sharp edges.

The adjustable cant ranges from 0 to 15 degrees using a Phillips screwdriver on the 1.5-inch belt clip. You can fine-tune retention pressure through screw adjustments for ideal extraction strength. The Posi-Click Audible Retention Lock confirms secure seating with an audible click.

Customer ratings average 4.6 stars across 1,028 reviews, with users praising the exceptional value and craftsmanship. The lifetime warranty backs your investment with replacement or full refund guarantees.

Best For: Glock 20/21/22 owners seeking a versatile, adjustable holster with reliable retention and lifetime warranty protection.

Pros:

• Adjustable cant (0-15 degrees) and retention pressure for personalized carry preferences
• Posi-Click Audible Retention Lock provides audible confirmation of secure pistol seating
• Lifetime warranty with replacement or full refund guarantee backed by 4.6-star rating from over 1,000 customers

Cons:

• Right-hand draw orientation only limits use for left-handed shooters
• Phillips screwdriver required for cant adjustments may not be convenient for frequent changes
• Limited color options with only black available

Amberide Glock 20/21/22 IWB Kydex Holster with Adjustable Cant

Adjustable cant capability sets the Amberide Glock 20/21/22 IWB Kydex Holster apart as the ideal choice for shooters who demand precise positioning and customizable carry angles. You’ll adjust the 1.5″ belt clip from 0° to 30° using the included hex key. The .08 KYDEX construction provides waterproof durability with sweat guard protection.

The Posi-Click lock system delivers audible confirmation when your firearm seats properly. You can fine-tune retention using the adjustable retention screw. This holster fits Glock 20/21/22 Gen 3-5 models without light attachments.

Available in 12 colors for both right and left-hand draw configurations. The 4-ounce design measures 5.5 x 5.5 x 0.7 inches. American craftsmanship backs this holster with lifetime warranty coverage and hassle-free replacement service.

Best For: Glock 20/21/22 owners who want a customizable IWB holster with adjustable cant and retention for concealed carry without light attachments.

Pros:

• Adjustable cant from 0° to 30° and customizable retention screw for personalized fit and draw angle
• Posi-Click lock system provides audible confirmation of proper firearm seating for enhanced security
• Lifetime warranty with American craftsmanship and waterproof KYDEX construction with sweat guard

Cons:

• Not compatible with firearms that have light or laser attachments, limiting tactical versatility
• Some users report fit issues with specific Glock model variations despite advertised compatibility
• Open barrel end design receives criticism from users who prefer fully enclosed holster protection

CYTAC OWB Holster for Glock 21 Gen 1-4 (Right Handed)

Military-grade polymer construction makes the CYTAC OWB holster an excellent choice for budget-conscious shooters who need reliable retention without sacrificing accessibility. You’ll get Level II retention with automatic trigger locking that produces an audible click when your Glock 21 locks securely. The quick-release button operates with your index finger for fast draws.

This holster fits Glock 21 Gen 1-4 models and the SF variant. You can’t use it with Polymer80 models featuring picatinny rails. The 360-degree adjustable cant system uses tooth gear technology for precise positioning. The paddle attachment accommodates belts up to two inches wide. With 4.5 stars from 539 reviews, users praise its durability for casual carry, though some note potential weakness under extreme impact conditions.

Best For: Budget-conscious shooters who own Glock 21 Gen 1-4 models and need reliable Level II retention with quick accessibility for casual carry, training, or duty use.

Pros:

• Level II retention with automatic trigger locking and audible click confirmation provides excellent security
• 360-degree adjustable cant with tooth gear technology allows precise positioning for optimal draw angle
• Military-grade polymer construction offers durability at an affordable price point with strong customer satisfaction ratings

Cons:

• Incompatible with Polymer80 Glock 21 models that have picatinny rails, limiting compatibility options
• No retention pad adjustment feature, which may result in slight wiggle room for some users
• Potential weakness under extreme impact conditions according to some user feedback

Blade-Tech OWB Holster for Glock 20, 21 (Right Hand)

Built from high-strength, heat-resistant polymer in the USA, this Blade-Tech OWB holster delivers superior performance for shooters who demand reliable outside waistband carry of their Glock 20 or 21. You’ll get compatibility with Gen 3, 4, and 5 models right out of the box.

The polymer construction outperforms standard Kydex materials. Your firearm stays secure through positive lock trigger guard retention with tactile feedback. Adjustable retention screws let you customize the fit precisely.

The versatile mounting system accommodates various attachments. The included Tek-Lok works with 1.5″ to 2.25″ belts effortlessly. You won’t need modifications for most optics platforms, including RMR, red dot sights, or suppressor height configurations.

Blade-Tech backs this holster with their lifetime warranty and Carry Confident Guarantee, ensuring you’re covered against manufacturing defects.

Best For: Glock 20/21 owners seeking a durable, USA-made OWB holster with optics compatibility and lifetime warranty protection for reliable open carry.

Pros:

• Superior polymer construction outperforms standard Kydex with adjustable retention and positive lock trigger guard
• Compatible with Glock Gen 3, 4, and 5 models plus most optics platforms including RMR and red dot sights out of the box
• Lifetime warranty with Carry Confident Guarantee and versatile mounting system with included Tek-Lok for 1.5″ to 2.25″ belts

Cons:

• Right-hand only configuration excludes left-handed shooters
• Limited to Glock 20 and 21 models only, not compatible with other firearm types
• OWB design may not suit concealed carry preferences compared to IWB options

Blackhawk, SERPA® Sportster® Glock

The Blackhawk SERPA® Sportster® Glock holster delivers active retention technology for civilian shooters who demand secure carry without compromising draw speed. The SERPA Auto-Lock system provides both passive retention and audible confirmation when you holster your firearm. You’ll appreciate the trigger finger release mechanism that guarantees intuitive operation during high-stress situations.

This polymer holster weighs just 0.4 pounds and measures 8.12 x 6.38 x 3.38 inches. The speed-cut design enables rapid target acquisition while maintaining weapon security. You can adjust the passive retention detent and cant angle for personalized fit. The paddle platform allows positioning from 12 to 6 o’clock without discomfort, making it versatile for concealed carry or range use.

Best For: Civilian shooters and concealed carry users who want secure active retention with fast draw capabilities for range training or low-threat environments.

Pros:

• SERPA Auto-Lock system provides active retention with audible click confirmation and intuitive trigger finger release
• Lightweight polymer construction at 0.4 pounds with adjustable cant and retention settings for personalized fit
• Versatile paddle platform allows comfortable positioning from 12 to 6 o’clock for concealed carry or open carry

Cons:

• Only includes paddle attachment platform, limiting mounting options compared to models with belt loops or other attachments
• May present concealment challenges for certain body types due to holster dimensions
• Recommended only for low-threat civilian use, not suitable for high-threat law enforcement operations

IWB Leather Holster for Concealed Carry (Fits Glock and Similar Handguns)

Concealed carry enthusiasts who prioritize durability and quick access will find this IWB leather holster perfectly suited for their Glock 21 and similar handguns. The high-quality cowhide construction features ≥0.1-inch material thickness with double-reinforced opening and sutures for enhanced longevity. You’ll appreciate the moderate hardness that balances comfort with structural integrity.

The 2.0-inch clip accommodates belts up to 1.8 inches wide. This holster fits Glock models 17, 19, 20, 21, 22, 31, 32, 37, 45, 48, and 49. Customer satisfaction remains high at 4.4 out of 5 stars from 170 reviews.

The manufacturer backs this product with a lifetime warranty and 100% satisfaction guarantee with no-questions-asked returns.

Best For: Concealed carry enthusiasts who own Glock pistols and prioritize durability, quick access, and comfortable inside-the-waistband carry with reliable leather construction.

Pros:

• High-quality cowhide construction with double-reinforced opening and sutures for enhanced durability and longevity
• Compatible with multiple Glock models (17, 19, 20, 21, 22, 31, 32, 37, 45, 48, 49) and similar sized handguns
• Backed by lifetime warranty and 100% satisfaction guarantee with no-questions-asked return policy

Cons:

• Belt width limitation of 1.8 inches maximum may not accommodate wider tactical or dress belts
• Leather material requires break-in period and regular maintenance compared to synthetic alternatives
• Limited to specific Glock models and similar sized handguns, excluding compact or subcompact variants

Safariland 7378 7TS ALS Paddle and Belt Loop Combo Holster

Safariland’s 7378 7TS ALS Paddle and Belt Loop Combo Holster delivers professional-grade retention for security personnel, law enforcement officers, and open carry advocates who prioritize weapon security without sacrificing draw speed. The Automatic Locking System secures your Glock 21 automatically upon holstering while allowing rapid thumb-release draw. You’ll appreciate the SafariSeven nylon construction that won’t damage your firearm’s finish and withstands temperatures from -50°F to 300°F. The open-top design eliminates retention straps for faster access. However, you shouldn’t expect full concealment capabilities—this holster excels at duty carry rather than discrete civilian concealment. Practice remains essential for smooth operation.

Best For: Security personnel, law enforcement officers, and open carry advocates who need professional-grade weapon retention with fast access capabilities.

Pros:

• Automatic Locking System (ALS) provides secure weapon retention while allowing rapid thumb-release draw
• SafariSeven nylon construction is non-abrasive to firearm finishes and withstands extreme temperatures (-50°F to 300°F)
• Open-top design eliminates retention straps for faster weapon access compared to traditional holsters

Cons:

• Not suitable for full concealment carry due to larger profile and bulk
• Standard paddle and belt loop positioning may sit lower on the body than preferred by some users
• Requires dedicated practice to master smooth operation, especially when using weapon lights

WARRIORLAND OWB Kydex Paddle Holster (Multiple Gun Compatibility)

Versatility defines the WARRIORLAND OWB Kydex Paddle Holster, making it an ideal choice for shooters who own multiple firearms and want one holster that accommodates their entire collection. You’ll appreciate its compatibility with Glock 17/20/21/22/23 (Gen 3-5), Glock 43/43X/43Xmos, Sig P365XL, Ruger Max-9/LCP Max .380, and Walther PPS M2. The .08-inch Kydex construction delivers waterproof durability while remaining lightweight.

You can adjust retention using the Posi-Click system with a Phillips screwdriver. The optics cut accommodates red dots, though laser/light-equipped firearms won’t fit. Hand-polished edges and a sweat shield enhance comfort during extended carry. Customer reviews average 4.3/5 stars, though some users report retention inconsistencies and rattling issues with specific models.

Best For: Shooters who own multiple compatible firearms and want a single, adjustable holster that can accommodate their entire collection for daily carry and outdoor activities.

Pros:

• Compatible with multiple popular firearm models including Glock, Sig, Ruger, and Walther pistols
• Adjustable Posi-Click retention system allows customization with a Phillips screwdriver for proper fit
• Durable .08-inch Kydex construction that’s waterproof, lightweight, and includes comfort features like hand-polished edges and sweat shield

Cons:

• Incompatible with firearms equipped with lasers or lights, limiting options for tactical setups
• Some users report retention inconsistencies and rattling issues with specific firearm models
• Mixed reviews on fit and tightness suggest quality control variations across different units

G20 21 22 Holster IWB Kydex Holster with Optics Cut

Multi-platform owners seeking a single holster solution will find the G20 21 22 Holster IWB Kydex Holster with Optics Cut delivers exceptional versatility across Glock’s full-size lineup. You’ll accommodate Glock 21, 20 (Gen 3-5), and 22 (Gen 5) models with this single holster. The .08-inch Kydex construction provides waterproof durability while maintaining lightweight portability.

The optics cut accepts various red dots without modification. Hand-polished edges eliminate sharp contact points during extended wear. You’ll adjust cant from -5 to +20 degrees for ideal draw angle. The protective sweat shield extends beyond the slide’s rear for enhanced comfort.

Retention adjusts via Phillips screwdriver for personalized security levels. Note the incompatibility with laser/light accessories. WARRIORLAND backs this holster with lifetime warranty coverage and 24/7 customer support.

Best For: Multi-platform Glock owners who need a single versatile holster for Glock 20, 21, and 22 models with optics compatibility and adjustable carry options.

Pros:

• Compatible with multiple Glock models (20, 21, 22) across different generations, eliminating the need for multiple holsters
• Optics cut accommodates various red dots and the adjustable cant (-5 to +20 degrees) allows customizable draw angles
• Lifetime warranty with 24/7 customer support and durable waterproof Kydex construction with hand-polished edges

Cons:

• Incompatible with any laser or light accessories, limiting tactical customization options
• Some users report discomfort while sitting and potential issues with accidental mag release activation
• Limited to specific Glock generations (Gen 3-5 for G20/21, only Gen 5 for G22)

Blade-Tech Total Eclipse OWB Holster for Glock 20/21

The Blade-Tech Total Eclipse OWB Holster delivers ambidextrous compatibility and streamlined concealment for Glock 20 and 21 owners who demand reliable everyday carry performance. This USA-made holster accommodates Gen 3, 4, and 5 models with adjustable retention that provides tactile feedback. You’ll benefit from optics compatibility supporting RMR, red dot, and suppressor height sights. The heat-resistant polypropylene construction weighs just 0.4 pounds while maintaining superior durability compared to traditional Kydex alternatives. Streamlined OWB loops secure your firearm close to your body for effective concealment beneath garments. The lifetime warranty covers all failures during intended usage with complete satisfaction guarantee.

Best For: Glock 20/21 owners seeking a durable, ambidextrous OWB holster with optics compatibility and reliable retention for everyday concealed carry.

Pros:

• Ambidextrous design with adjustable retention and tactile feedback for secure firearm positioning
• Compatible with most optics platforms including RMR, red dot, and suppressor height sights
• Lifetime warranty with heat-resistant polypropylene construction that’s lighter and more durable than Kydex

Cons:

• Some customers report issues with belt loop sizing requiring tactical belts for optimal fit
• Limited to specific Glock models (20/21 Gen 3, 4, 5) reducing versatility for multi-gun owners
• OWB design may be less concealable than IWB alternatives for certain body types and clothing styles

Factors to Consider When Choosing a Glock 21 Holster

I’ll help you select the right Glock 21 holster by examining five critical factors that directly impact performance and usability. Your holster choice must balance material durability with retention security while accommodating your preferred carry position and adjustment needs. These considerations determine whether your holster will provide reliable service or become a liability in critical situations.

Material and Durability

When selecting a Glock 21 holster, material choice directly impacts durability, maintenance requirements, and long-term performance. I recommend considering two primary options: Kydex and leather.

Kydex holsters constructed from .08″ material offer superior impact and abrasion resistance. They’re completely waterproof and washable, requiring minimal maintenance. High-strength polymer construction provides exceptional performance in harsh environmental conditions without aging concerns.

Leather holsters deliver classic aesthetics and enhanced comfort against your body. Quality handmade leather options feature reinforced stitching and material thickness exceeding 0.1 inches for maximum longevity. However, leather can absorb moisture without proper care, potentially compromising durability.

Both materials offer solid retention capabilities when properly constructed. This secure firearm retention minimizes friction and abrasion, extending both holster lifespan and preserving your Glock 21’s finish.

Retention System Security

Beyond material selection, your holster’s retention system determines how securely your Glock 21 stays in place during daily carry and high-stress situations. I recommend Level II retention systems that require two distinct actions for firearm removal. These provide enhanced security during physical activity while maintaining reasonable draw speeds.

Adjustable retention screws let you customize tension based on your preference and carry conditions. Turn clockwise to increase retention force, counterclockwise to decrease it. Test different settings until you achieve smooth draws without excess looseness.

Active retention mechanisms engage the trigger guard directly, offering superior security compared to passive friction systems. Look for audible click confirmations during holstering – this feedback guarantees proper weapon seating. Quality retention systems balance quick access with unauthorized access prevention, critical for both tactical applications and everyday concealed carry scenarios.

Carry Position Options

Three primary carry positions dominate the holster market for your Glock 21, each offering distinct advantages depending on your specific needs and environment. Inside the waistband (IWB) holsters provide maximum concealment by positioning the firearm under your clothing. This design distributes the Glock 21’s weight evenly across your waist, reducing printing and maintaining discretion. Outside the waistband (OWB) holsters sit externally, delivering faster draw speeds and enhanced comfort during extended carry periods. They’re ideal for open carry situations or range use. Many holsters feature adjustable cant angles, typically ranging from 0 to 15 degrees forward. This customization affects both draw mechanics and comfort. Your carry position choice also impacts compatibility with tactical belts, optics mounts, and additional gear configurations.

Adjustability and Cant

Adjustability transforms a standard holster into a personalized carrying system that adapts to your specific needs and body mechanics. Most quality Glock 21 holsters feature cant adjustment ranging from 0 to 30 degrees. This range allows you to fine-tune your draw angle for ideal comfort and accessibility.

Retention pressure customization through screw adjustments lets you achieve extraction strength tailored to your preferences. You’ll find the perfect balance between security and smooth draw speed. Adjustable cant features enhance versatility, enabling both IWB and OWB carry configurations with the same holster.

Your body shape and preferred carry position greatly affect concealment and draw ease. Some holsters include audible retention confirmation systems that secure your firearm while permitting smooth draws when you’ve applied custom tension settings.

Comfort and Fit

When selecting a Glock 21 holster, comfort and fit directly impact your ability to carry effectively throughout extended periods. I recommend prioritizing a snug fit that prevents unnecessary movement during daily activities and while seated. This guarantees confidence in your carry setup.

Look for lightweight materials like .08″ Kydex, which provides a thin profile that reduces bulk for all-day wear. Adjustable cant features let you modify the carry angle, enhancing both comfort and draw capability. Padded edges or sweat guards minimize contact irritation during active movement, preventing chafing that could compromise your carry routine.

Proper sizing is essential – your holster must accommodate the Glock 21’s dimensions without creating pressure points or allowing excessive play that affects retention or comfort.

Optics Compatibility

How does your Glock 21’s optics setup affect holster selection? You’ll need a holster with specific cutouts designed for RMR or red dot sight compatibility. An optics cut allows secure carrying while keeping your sight unobstructed and enables quick draws.

I recommend holsters with adjustable retention mechanisms when using optics. This feature lets you secure your firearm adequately while maintaining smooth draw capabilities. The retention system prevents accidental dislodging during movement.

Look for holsters marketed as accommodating suppressor height sights. These models typically provide additional clearance space for optics without compromising accessibility. The extra room guarantees your mounted optics won’t interfere with holstering or drawing.

Proper retention becomes critical with optics-equipped firearms. You’ll want mechanisms that secure both the gun and sight assembly effectively while allowing rapid access when needed.

Belt Attachment Style

Your belt attachment style determines how securely and conveniently you’ll carry your Glock 21 holster throughout the day. Paddle attachments offer quick installation and removal without threading through belt loops. You’ll appreciate this flexibility when switching between different carrying positions or removing the holster entirely. However, paddle designs may shift during movement and provide less concealment than belt loop alternatives.

Belt loops create a more stable platform for your Glock 21. The holster maintains consistent positioning during draws and daily activities. You’ll need to thread your belt through the loops during initial setup, but this extra step guarantees superior retention. Most belt loops accommodate 1.5-inch to 1.75-inch belt widths. Adjustable cant features let you customize the holster’s angle between 0 and 15 degrees forward, optimizing draw mechanics for your body type and preferences.

Concealment Effectiveness

Concealment effectiveness depends on multiple design factors that work together to minimize your Glock 21’s visibility beneath clothing. IWB holsters outperform OWB options by positioning the firearm inside your waistband, greatly reducing printing. Material choice matters considerably—Kydex creates a thinner profile than bulky leather alternatives. Adjustable cant angles from 0 to 30 degrees let you position the pistol to match your body shape and clothing style. Sweat guards and hand-polished edges enhance comfort during extended wear, allowing normal clothing fit without adjustment. Adjustable retention systems create the snug fit necessary to prevent unwanted movement and printing. These technical specifications work synergistically to achieve ideal concealment performance for your Glock 21.

On a final note

I’ve analyzed eight proven Glock 21 holsters that deliver reliable performance. Each option offers distinct advantages—whether you prioritize concealment, retention, or draw speed. The POLE.CRAFT and Amberide models excel for concealed carry, while Blade-Tech options dominate for duty use. CYTAC provides excellent value, and Blackhawk delivers proven retention technology. Consider your carry style, body type, and intended use before selecting. Any of these holsters will serve you well with proper fitting and training.