Glock 45 Holsters Built for a Crossover Pistol
The Glock 45 is a crossover pistol. It pairs a compact Glock 19-length slide and 4.02-inch barrel with a full-size Glock 17-length grip and 17-round magazine. That gives you the control of a full-size frame with the quicker handling of a compact slide, at about 7.44 inches long and 24.5 ounces unloaded.
That mixed geometry is exactly why a Glock 45 needs a holster molded for it. A Glock 19 holster leaves the longer grip unsupported, and a Glock 17 holster leaves extra material around the shorter slide.
Every holster in this collection is cut to the G45's real dimensions for a positive lock-up and a fully covered trigger guard.
Glock 45 Holsters With a Light and Red Dot
Most Glock 45 carriers today run a weapon light, a red dot, or both at once, and that is the most requested setup in this collection. These holsters are molded around the exact light body and cut to clear a red dot sight, so the pistol seats fully and retains securely with both accessories mounted.
You can run a light and red dot in either carry style. OWB and duty models give you the cleanest draw with a full-size weapon light attached, while IWB models keep the same light and optic concealed for everyday carry.
Light-bearing holsters index off the light itself for retention, so they are built for the specific light you carry and should be used with that light installed.
Common light and red dot pairings these holsters support include a Streamlight TLR-7A or SureFire X300 with a Trijicon RMR or Holosun 507C, plus suppressor-height backup sights for a clean co-witness.
Glock 45 MOS and Optic-Ready Holsters
For the Glock 45 MOS, optic-ready holsters provide full clearance for red dot sights mounted to the MOS slide.
The molded sight channel clears RMR-footprint optics like the Trijicon RMR and Holosun 507C and 508T, along with taller suppressor-height irons, so nothing contacts the optic during holstering or the draw.
If you carry a red dot without a light, these MOS holsters are the place to start.
Glock 45 IWB Holsters
Glock 45 IWB holsters carry inside the waistband for concealment. The full-size grip and 24.5-ounce weight reward attention to ride height and cant, which you can adjust to tuck the grip in and minimize printing under everyday clothing.
Full sweat guards protect the slide, and adjustable retention lets you set the exact draw tension you want. IWB options here include slim concealment shells as well as light-bearing and optic-ready fits.
Glock 45 OWB Holsters
Glock 45 OWB holsters are the broadest selection in this collection and cover concealed OWB, open carry, range use, and duty.
The G45's manageable weight keeps a belt from sagging during all-day wear, and light-bearing OWB models hold full retention and a clean draw even with a duty-size weapon light attached. Paddle versions add tool-free on and off for range sessions or quick removal.
Glock 45 Appendix Holsters
For appendix carry, the Glock 45 rides at the front of the waistband around the 1 o'clock position. The full-size grip is the main concealment variable, so appendix-specific shells use a claw and wedge to rotate the grip inward and tilt it off the body.
Ride height and cant tuning, plus clothing choice, make a noticeable difference with this grip length.
Will It Fit My Glock 45? Gen 5 and Gen 6
The Glock 45 launched as a Gen 5 pistol, and the Glock 45 Gen6 arrived with Glock's sixth generation in early 2026. Both share the signature crossover layout of a full-size grip and compact slide, but they are not dimensionally identical.
Gen 5 features that affect holster fit include the flared magwell, ambidextrous slide stop, and reversible magazine catch, all of which these holsters are molded to clear.
The Gen 6 frame and slide were reshaped, with a recontoured palm-swell grip, an undercut trigger guard, and new slide geometry, so a holster cut for the Gen 5 G45 will not always index or retain a Gen 6 G45 correctly.
If you carry a Gen 6, confirm the listing covers Gen 6 before ordering. We add Gen 6 fits as they are validated, so check the current variant options on each product page.
One thing that does not change: a Glock 19 holster will not properly fit a Glock 45. The slide length matches, but the longer G45 grip needs the extra coverage, so use a holster cut for the Glock 45.
Exact Light and Optic Compatibility
Each light-bearing Glock 45 holster is laser-scanned to a specific light body, and MOS holsters are cut for RMR-footprint optics. Supported configurations include:
- Standard Glock 45 with no light or optic
- Glock 45 MOS for RMR-footprint red dots (Trijicon RMR, Holosun 507C and 508T, and similar)
- Streamlight TLR-1 and TLR-7A
- SureFire X300 and XC1
- Nightstick TCM-550XL and XLS, TWM-850XL and XLS, TWM-30, and TWM-350
- Crimson Trace DS-121, LG-436, and Rail Master Pro CMR-204 and 205
- Viridian Reactor R5 green or red laser ECR
Match your exact light model to the holster's listed compatibility, since a holster cut for a different light will not retain or seat correctly.
Common Fit Mistakes to Avoid
Mismatched light model: a holster molded for a different light will not retain the pistol or seat fully. Match the exact model, including the specific designation.
Running a light-bearing holster without the light: these holsters retain off the light body, so removing the light leaves the pistol loose.
Assuming a Glock 19 holster will work: the longer G45 grip will be left unsupported.
Over-tightening retention: excessive tension creates harsh draws and wears the finish. Set it to hold securely during hard movement, no more.
Skipping a real gun belt: the G45's weight, plus a loaded magazine and light, needs a supportive belt so the holster does not sag or tip.
Specialty and Professional Carry
Beyond everyday IWB and OWB, this collection also includes duty holsters in Level II and Level III retention, along with chest, drop leg, and hook-and-loop options for outdoor, vehicle, and armor-based carry where waistline access is blocked.
These serve hiking, security, and law enforcement use where standard belt carry is not practical.
FAQ
Does Alien Gear make a Glock 45 holster with a light and red dot?
Yes. Many Glock 45 holsters here are molded for a weapon light and cut to clear a red dot at the same time, in both OWB and IWB. Match the listing to your exact light model and optic footprint.
Do you have a Glock 45 Gen 6 holster?
The Glock 45 Gen6 shares the crossover layout but has a reshaped frame and slide, so it needs a Gen 6-specific fit. We add Gen 6 fits as they are validated, so check the variant options on the product page before ordering.
Will a Glock 19 holster fit a Glock 45?
No. The slide length is the same, but the Glock 45 has a longer, full-size grip that a Glock 19 holster will not support. Use a holster cut for the Glock 45.
What is a Glock 45 MOS holster?
It is a holster cut to clear a red dot sight mounted on the MOS optic-ready slide, with room for the optic and suppressor-height backup sights so nothing contacts the red dot during the draw or reholster.
Can I carry the Glock 45 concealed?
Yes. IWB and appendix holsters conceal the G45 well when ride height and cant are tuned for the full-size grip. The compact slide helps it carry smaller than its capacity suggests.
Which weapon lights are supported?
Streamlight TLR-1 and TLR-7A, SureFire X300 and XC1, several Nightstick TCM and TWM models, Crimson Trace lasers, and the Viridian Reactor R5. Confirm your exact model against the holster's listed compatibility.
Is the Glock 45 good for both duty and concealed carry?
Yes. The full-size control with compact-slide handling is why many carriers use one Glock 45 across duty, home defense, and concealed carry. This collection covers all three with IWB, OWB, and duty options.
