The Walther PDP earned a reputation for best-in-class ergonomics and one of the smoothest striker triggers on the market, and every model comes optic-ready straight from the factory. Whether you carry the Compact or the Full Size, the PDP conceals well inside the waistband with the right holster. Here's the best IWB holster for the Walther PDP, and the exact size to order.
The Best IWB Holster for the Walther PDP: Mainstay™ Clipless IWB
For the PDP, we recommend the Mainstay™ Clipless IWB Holster — and the size depends on your model. Its clipless, silicone-coated body grips the waistband with no belt clip to print, covers the trigger guard, and flexes for comfortable appendix, strong-side, or small-of-back carry.
Walther PDP Compact:
- Bare: size 5C
- + red dot optic: size 5C-RDO
- + weapon light: size 5CL
- + optic and light: size 5CL-RDO
Walther PDP Full Size:
- Bare: size 5
- + red dot optic: size 5-RDO
- + weapon light: size 5L
- + optic and light: size 5L-RDO
Since every PDP ships optic-ready, be sure to pick an RDO size if you've mounted a red dot.
Why the Mainstay Works for the PDP
The PDP is a full-featured duty-and-carry pistol, and its optic and optional light change the holster fit — which is exactly why the Mainstay's size range matters. It secures the pistol and protects the trigger while staying comfortable enough to carry a larger gun all day. Made in the USA and priced under $35, it's one of our most popular IWB holsters.
Complete Your PDP Carry Setup
A larger pistol needs support, so pair yours with a reinforced gun belt, 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 Walther PDP?
The Walther PDP Compact fits size 5C and the PDP Full Size fits size 5. Add “-RDO” for a red dot, “L” for a weapon light, or “L-RDO” for both (for example, 5C-RDO or 5L-RDO).
Does the Mainstay fit the PDP with a red dot?
Yes. Every Walther PDP is optic-ready, so choose the RDO size for your model — 5C-RDO for the Compact or 5-RDO for the Full Size.
What's the difference in fit between the PDP Compact and Full Size?
The Compact uses the 5C size range and the Full Size uses the 5 size range. Pick the one that matches your pistol, then add optic or light options as needed.
Ready to carry? Get the Mainstay Clipless IWB Holster in size 5C (Compact) or size 5 (Full Size) for your Walther PDP.