Glock Holsters That Fit More Than Just Dimensions — Built to Handle Function, Lights, and Optics
From the Glock 17 and Glock 19 to specialized builds like the 43X MOS with TSM-14 or the Glock 40 MOS, Glock pistols come in dozens of configurations. Whether you're running a slimline model like the Glock 48, a full-frame duty gun like the Glock 21 with TLR-7A, or something unique like a Glock 23 with Viridian Reactor R5, you need a holster that's molded for more than just a generic shape.
That’s why Alien Gear produces holsters across the Cloak, ShapeShift, Low-Pro, Photon, and Rapid Force lines—each built to handle unique setups, carry preferences, and retention needs.
Light and laser compatibility across Glock platforms
If you carry a Glock with a mounted light or laser—like the Glock 19 MOS with TLR-7A, Glock 21 with Nightstick TCM-550XL, or Glock 43 with Streamlight TLR-6—fit and draw resistance are everything.
These holsters are molded to accommodate lights from Surefire, Streamlight, Nightstick, Crimson Trace, LaserMax, and Viridian, with proper channeling for trigger coverage and clearances that keep your attachments safe and functional.
MOS and red dot ready for Glock optic carriers
For users running Glock MOS models—like the Glock 17 MOS, 19 MOS, 45 MOS, or 43X MOS—optic clearance is already built in. Whether you're mounting an RMR, Holosun 507C, or Shield RMSc, holsters are optic-cut and tested to prevent snagging, even with suppressor-height sights or co-witness setups.
Concealment without compromise for slimline and compact Glocks
Concealed carry users with Glock 26, 27, 43, 43X, or 48 models appreciate deep concealment and minimal printing. Cloak Tuck IWB and Low-Pro appendix holsters are engineered to sit flush, ride tight, and reduce grip signature under shirts or light jackets.
Even users with lights on their 43X or Crimson Trace on their Glock 26 get a secure fit with retention dialed in at the trigger guard—not the frame or accessory rail.
Duty-ready options with Level 2 and Level 3 retention
If you’re carrying a Glock 17, 22, 34, or 45 in a uniformed or tactical role, the Rapid Force Duty Holster offers **Level 2 and Level 3 retention** with thumb release systems and compatibility with light-bearing setups.
You’ll find support for weapon-mounted lights like the Surefire X300 and Nightstick TWM-850XL across full-size frames—including MOS variants and even Gen 5 platforms.
Chest, drop leg, and hook & loop holsters for field, vehicle, or tactical carry
Not everyone carries at the waistband. Whether you're hiking with a Glock 20SF, driving long shifts with a Glock 19X, or running a drop leg rig for range drills with a Glock 23 MOS, you can mount your preferred Glock holster on a chest harness, thigh rig, or hook & loop platform without changing the retention shell. The ShapeShift system adapts to your carry needs without needing a new holster every time you change positions or gear.
Support for uncommon and caliber-specific Glocks
We also cover models that many holster makers skip: **Glock 29 and 29SF**, Glock 30S and 30SF, Glock 31–33 for .357 SIG, Glock 36 and 37 for .45 GAP, Glock 44 for .22LR, and Glock 39 subcompacts. Whether your build includes a Crimson Trace LG-436, a Nightstick TWM-30, or you're just running irons, we mold for your exact spec.
Built for comfort, tuned for performance, and available left- or right-handed
Breathable backers, neoprene padding, sweat guards, and steel-core reinforcements keep Cloak and ShapeShift holsters comfortable for long hours, whether you’re carrying a Glock 26 IWB or a Glock 17 in a chest rig. All models are available in left-hand and right-hand draw**, and retention is always user-adjustable with no tools required.
Whether you’re outfitting a duty Glock 45 MOS with a Surefire X300, concealing a Glock 43X with Nightstick TSM-11, or just need an IWB rig for your Gen 3 Glock 19, you’ll find a holster that locks in your setup and keeps it exactly where you need it.
With support for over 100 Glock configurations, Alien Gear ensures you’re covered—every frame size, every light, every draw.
What Glock models have size differences that affect holster compatibility?
Glock pistols vary in slide length, frame size, and accessory rails. For example, the Glock 17 (full-size) has a longer slide and grip than the Glock 19 (compact), while the Glock 43X and 48 have slimline frames. Alien Gear molds holsters to specific Glock models to ensure proper fit, secure retention, and safe trigger coverage.
How do MOS and non-MOS Glock models differ when selecting a holster?
Glock MOS (Modular Optic System) models have a milled slide for mounting red dot sights. These optics require holsters with an optic cut to prevent interference. If you're using a Glock 19 MOS, for instance, be sure the holster shell supports clearance for sights like the Trijicon RMR or Holosun 507C.
Can suppressor-height sights on a Glock affect holster fitment?
Yes. Suppressor-height sights are taller than standard factory sights and may cause friction or improper seating in holsters with low sight channels. Many Alien Gear Glock holsters accommodate these taller sights, particularly in duty holster configurations or optic-ready shells.
Are Glock 43X and 48 holsters interchangeable?
Not always. While the Glock 43X and Glock 48 share a similar slim frame, the slide length of the 48 is longer, which can affect holster fitment. Choose a holster molded specifically for the 43X or 48 to ensure proper alignment, retention, and reholstering performance.
How does barrel length impact holster design for Glock pistols?
Long-slide Glocks like the Glock 34 require holsters with an open muzzle or extended coverage. In contrast, shorter models like the Glock 26 are often paired with compact holsters for easier concealment. Barrel length affects draw angle, comfort, and holster size — especially in IWB or AIWB carry.
Is there a difference between holsters for Gen 3, Gen 4, and Gen 5 Glocks?
While external dimensions are generally consistent across generations, Gen 5 Glocks may have differences in the slide nose profile, ambidextrous slide stop, or magwell flare. Most Alien Gear holsters are compatible across generations but confirm compatibility when choosing a shell for a Glock 19 Gen 5, for example.
What holster ride height works best with Glock 17 vs. Glock 19?
For full-size models like the Glock 17, a slightly lower ride height helps balance the longer grip and slide during OWB or duty use. For compact models like the Glock 19, a higher ride IWB setup aids in concealment. Alien Gear holsters with adjustable ride height allow users to customize for comfort and draw efficiency.
Do Glock pistols with threaded barrels require special holsters?
Yes. A threaded barrel extends beyond the slide and can interfere with closed-end holsters. Choose a holster with an open muzzle design, which allows the threaded portion to protrude safely without compromising retention or reholstering. This is common with Glock 19 barrel upgrades.
What are the retention options available for Glock holsters?
Alien Gear offers holsters with passive retention via adjustable tension screws, as well as active retention for duty applications (e.g., thumb release or locking hoods). Retention systems should be chosen based on carry method, Glock model weight, and intended use (concealed carry, range use, or duty carry).
