The Glock 43 and 43X are among the most trusted concealed carry pistols on the market — legendary Glock reliability in a frame slim enough to vanish inside the waistband. The single-stack 43 and the higher-capacity 43X both carry beautifully, but only with a holster that's just as low-profile. Here's the best IWB holster for the Glock 43 and 43X, and the exact size to order.
The Best IWB Holster for the Glock 43 & 43X: Mainstay™ Clipless IWB
For both the Glock 43 and 43X, we recommend the Mainstay™ Clipless IWB Holster in size 7. Its silicone-coated, clipless exterior grips the inside of your waistband and stays put with no belt clip to print or snag — exactly what you want for a slim gun you plan to carry discreetly every day. It fully covers the trigger guard and supports appendix, strong-side, and small-of-back carry.
Add an optic or light? Match the size to your Glock:
- Glock 43 / 43X (bare): size 7
- + red dot optic: size 7-RDO
- + weapon light: size 7L
- + optic and light: size 7L-RDO
Size 7 covers both the single-stack Glock 43 and the slimline, higher-capacity Glock 43X.
Why the Mainstay Works for the Glock 43 & 43X
The 43 and 43X are built to be carried, not admired — and the Mainstay matches that philosophy. Its flexible, no-nonsense body holds the pistol securely while flexing with your movement, so a full day of carry doesn't mean a full day of discomfort. Made in the USA and priced under $35, it's one of our most popular IWB holsters for a reason.
Complete Your Glock Carry Setup
Back up your holster with a reinforced gun belt to carry the weight comfortably, and browse our full range of IWB holsters for a second carry option. New to concealed carry? Start with our everyday carry (EDC) guide.
Frequently Asked Questions
What size Mainstay holster fits the Glock 43 and 43X?
Both the Glock 43 and Glock 43X fit the Mainstay Clipless IWB Holster in size 7. Choose size 7-RDO for a red dot, 7L for a weapon light, or 7L-RDO for both.
Does the same holster fit both the Glock 43 and 43X?
Yes. The Mainstay in size 7 fits both the single-stack Glock 43 and the slimline Glock 43X.
Is the Mainstay good for appendix carry with a Glock 43X?
Yes. The Mainstay's soft, flexible body makes it comfortable for appendix (AIWB) carry, and it also works for strong-side and small-of-back positions.
Ready to carry? Get the Mainstay Clipless IWB Holster in size 7 for your Glock 43 or 43X.