Glock 21 IWB Holster
🎯 An IWB Glock 21 holster helps manage the full-size .45 Auto frame by keeping the holster close to the body for concealed carry.
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Glock 21 Holsters
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IWB Holster fits: Glock 20 21 $ 44.95 Add to cart -
Paddle Holster fits: Glock 20 21 $ 49.95 Add to cart -
OWB Holster fits: Glock 20 21 $ 59.95 Add to cart -
Tuckable IWB Holster fits: Glock 20 21 $ 49.95 Add to cart -
Plus Line IWB KYDEX Holster fits: Glock 20 21 $ 64.95 Add to cart -
Leather Hybrid Holster fits: Glock 20 21 (Wide) $ 69.95 Add to cart -
Leather Hybrid Holster fits: Glock 20 21 $ 74.95 Add to cart
These holsters are made for the Glock 21, Gen 2 through Gen 5, the 21 MOS and the Glock 21 V MOS, and they carry the Glock 20 too. Kydex IWB holsters start at $44.95, every one is cut for a red dot, and they’re made in Jacksonville, Florida.
Glock 21 Holster Styles
- IWB, $44.95. Claw Compatible, adjustable cant and Posi-Click® retention, right or left hand.
- Tuckable IWB, $49.95. Lets you tuck a shirt in over the gun.
- Plus Line IWB, $64.95. The IWB with the claw installed and a spring steel belt clip.
- OWB Paddle, $49.95. Goes on and off without taking off your belt. Good for the range and open carry.
- OWB Belt Loop, $59.95. A low-profile pancake design on two belt loops.
- Leather Hybrid IWB, from $69.95. A Kydex shell on a cowhide leather backer that shapes to your body, with standard and wide backers.
Carrying a .45 Glock 21
The Glock 21 is a full-size .45 on Glock’s large frame, the same size as the Glock 20, and the grip is what prints. For concealed carry, run the tuckable or the IWB with a claw on a stiff gun belt. For the range or open carry, the paddle and belt loop OWB keep it outside the waistband. We don’t make a light-bearing Glock 21 holster, so these won’t take a gun with a light mounted.
Made in Jacksonville, Florida
Every holster is made 100% in the USA at our shop in Jacksonville, Florida, and backed by a lifetime warranty. Orders placed by 1 PM ET ship the same day.
More Glock Holsters
The same holsters are compared in our Glock 20 holster buyer’s guide. Carry another Glock? See Glock 20, Glock 30 or all Glock holsters.
Glock 21 Holster Guide
Find the Best Glock 21 Holster for .45 Auto Carry and Range Use
Glock 21 holsters are built for a full-size .45 Auto pistol, so comfort, retention, and stable carry matter when choosing the right setup.
Use this guide to compare IWB, OWB, appendix, and light-bearing options so you can choose a Glock 21 holster for concealed carry, range training, or open carry.
Choose the Best Glock 21 Holster for Your Setup
Glock 21 OWB Holster
🛡️ OWB Glock 21 holsters are a strong choice for range days, training, and open carry when comfort and access are the top priorities.
Glock 21 Appendix Holster
⚡ Appendix carry with a Glock 21 requires careful belt setup, ride height, and concealment planning because of the pistol’s full-size profile.
Glock 21 MOS Holster
✅ A Glock 21 MOS holster should provide optic-ready clearance while preserving reliable retention and access for red dot carry setups.
Glock 21 Fit, Comfort, and Retention
🔎 Because the Glock 21 is a larger .45 Auto pistol, prioritize secure retention, full trigger guard coverage, and a stable belt attachment.
Glock 21 Gen, MOS, and Accessory Fit
🔎 Confirm generation, MOS/optic setup, lights, sights, and barrel accessories before choosing a holster for your Glock 21.
Made in USA Made in-house in Jacksonville, Florida with American-made materials and equipment
Posi-Click® Retention Audible, adjustable retention with full trigger guard coverage
Precision Engineered Designed and fit-tested to match supported Glock 20 configurations
Lifetime Guarantee Covered by the Rounded Gear lifetime warranty
Glock 21 Holster Buyer’s Guide
What Is the Best Glock 21 Holster for Concealed Carry?
The best Glock 21 holster for concealed carry is usually a stable IWB holster with secure retention, full trigger guard coverage, and enough ride-height adjustment to manage the pistol’s full-size frame.
Should You Choose an IWB or OWB Glock 21 Holster?
Choose IWB if concealment is the priority. Choose OWB if range use, open carry, comfort, and faster access are more important than deep concealment.
Does a Glock 21 MOS, Light, or Accessory Setup Need a Different Holster?
If your Glock 21 has an optic, weapon light, threaded barrel, suppressor-height sights, or compensator, confirm holster compatibility before ordering. Accessory fit is especially important with full-size carry setups.
What Is the Best Glock 21 Holster for Range and Outdoor Carry?
The Glock 21 is popular for shooters who want .45 Auto performance in a full-size platform. OWB carry is often the most comfortable option for range training, outdoor use, and open carry.
Why Choose a Kydex Glock 21 Holster?
Kydex helps maintain consistent shape, retention, and reholstering performance over time. For a larger .45 Auto pistol like the Glock 21, that structure helps support safer, more repeatable carry.
Glock 21 Holster FAQs
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The best Glock 21 holster is a rigid Kydex holster molded for Glock's large frame, in IWB for concealed carry or an OWB paddle for range and duty use. Because the 21 is a full size .45, ride height and a stiff gun belt matter more than they would on a compact. Most Glock 21 holsters also hold the Glock 20.
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It can be carried daily, but it asks more of you than a compact does. The 21 is a full size .45 on Glock's large frame, roughly 8.07 inches long and 1.34 inches wide, holding 13+1. A tuckable IWB holster with a claw, a high ride height and a proper gun belt is close to mandatory for concealment.
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No. The Glock 21 uses Glock's large frame while the 17 uses the standard frame, so the 21 is wider and taller through the slide and will not seat correctly. The Glock 20 is the right cross-fit, because it shares that large frame, and most makers list a single Glock 20/21 option.
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Yes. The Gen 5 Glock 21 was among the models retired in November 2025, but the gun continues as the G21 V MOS in Glock's V Series, which reached dealers in early 2026. In that lineup it is offered in the optics ready MOS configuration. Holsters for earlier Glock 21s remain widely available.
Glock 21 Holster Resources and Carry Tips
