Best IWB Holster for the Glock 48

July 1, 2026

The Glock 48 gives you a full-length sight radius and a slim, 10+1 frame — a slimline 9mm that shoots like a compact but conceals like a single-stack. It's become a go-to for shooters who want an easy-carrying Glock without giving up shootability. Here's the best IWB holster for the Glock 48, and the exact size to order.

The Best IWB Holster for the Glock 48: Mainstay™ Clipless IWB

For the Glock 48, we recommend the Mainstay™ Clipless IWB Holster in size 8. The Mainstay's clipless, silicone-coated body grips the inside of your waistband with no belt clip to print or snag, fully covers the trigger guard, and flexes for comfortable appendix, strong-side, or small-of-back carry.

If you run an optic or light, the fit changes — select the exact option below:

Glock 48 (bare): size 8
+ red dot optic: size 5C-RDO
+ weapon light: size 5CL
+ optic and light: size 5CL-RDO

Why the Mainstay Works for the Glock 48

The 48's whole appeal is a slim profile that still gives you a full grip and sight radius — and a bulky holster works against that. The Mainstay stays thin and flexible, concealing the longer slide comfortably while holding the pistol securely and protecting the trigger. Made in the USA and priced under $35, it's one of our most popular IWB holsters.

Complete Your Glock 48 Carry Setup

Pair it with a reinforced gun belt for all-day support, and browse our full range of IWB holsters for a second carry option. New to concealed carry? Our everyday carry (EDC) guide covers the full loadout.

Frequently Asked Questions

What size Mainstay holster fits the Glock 48?

The Glock 48 fits the Mainstay Clipless IWB Holster in size 8. With attachments, choose size 5C-RDO for a red dot, 5CL for a weapon light, or 5CL-RDO for both.