Additional information
| Length (Factory Unthreaded Barrel Length) | 3.5" barrel, 4" barrel, 4.5" barrel, 5" barrel |
|---|---|
| Compensator | Ultra, Ultra Flat-Face, Micro |
$360.00 Original price was: $360.00.$300.00Current price is: $300.00.
1x PMM Compensator for Walther PDP (polymer)
OR
1x PMM Threaded Barrel
1 x Shim Kit
Optional Muschi Mounting Block
Note: Threaded pistol barrels are not legal in all areas. It is your responsibility to check your local laws before ordering a threaded barrel. You also understand and agree that all firearms and firearms related activities are potentially dangerous if handled/conducted improperly and can pose risks and hazards to yourself and others, which may result in property damage, serious injury or death.
NOT COMPATIBLE with:
Our ultra comp for the PDP was designed around the factory spring, but you may want to change it out. We recommend not going any lighter than 15 lbs.
We personally like and recommend the ZR Tactical Solutions PDP Captured Guide Rod. It is also compatible with the ZR Tactical Solutions PDP Ultra Mass Guide Rod.
Q: What size do I choose?
A: We do not include the thread length in our length options– 4″ is compatible with a slide with a 4″ unthreaded barrel, or 4.6 factory threaded barrel. 4.5″ is compatible with a slide with a 4.5″ unthreaded barrel, or a 5.1″ factory threaded barrel.
Q: Can I buy just the micro or ultra comp?
A: Short answer, no. The barrel and comp are proprietary to one another. Due to the thread depth in the comp and the length of thread on the barrel, our barrel and comp can only be used together.
Please order based off of slide length/ unthreaded barrel length.
3.5″ is compatible with the PDP F 3.5″.
4″ is compatible with a slide with a 4″ unthreaded barrel, or 4.6 factory threaded barrel.
4.5″ is compatible with a slide with a 4.5″ unthreaded barrel, or a 5.1″ factory threaded barrel.
5″ is compatible with a slide with a 5″ unthreaded barrel.
To achieve a flush fit look you will need a 4″ PDP slide and a 5″ full length frame paired with our 4″ ultra flat-faced barrel and comp.
A 4.5″ PDP slide and a 5″ full length frame with our 4.5″ micro barrel and comp will hang past the frame by approximately .100″.
Please note, a 3.5″ slide will only function on a 3.5″ frame, so not there are no flush fit options.

For flush fit, skip to minute six of the video below.
115gr:
Federal American Eagle
Speer Lawman
Wolf
Remington UMC
Sig Sauer
Fiocchi
Magtech
124gr:
Blazer
Speer Lawman
Federal American Eagle
Sig Sauer
Winchester
PMC
Remington UMC
147gr:
Most ammo will run, but you will see less performance due to a lack of velocity
Ammo to stay away from:
Blazer 115
Winchester White Box 115
Armscor 115
PMC 115
All reloads or reman ammo
PMM reserves the right to make esthetical design changes. While we try to accurately represent our current product offerings’ designs, there may be some esthetical variation from the product posted on this page and the product you receive.
| Length (Factory Unthreaded Barrel Length) | 3.5" barrel, 4" barrel, 4.5" barrel, 5" barrel |
|---|---|
| Compensator | Ultra, Ultra Flat-Face, Micro |





Jordan H (verified owner) –
I had the single port PMM comp on my PDP PRO X and the upgrade significantly reduced the recoil. It felt like a completely different gun. The original comp was great and super flat but damn, the ultra comp really took it up a level. The barrel is extremely accurate and the install was pretty straight forward with the muschi block. 10/10 worth every penny.
Daniel Rumbold (verified owner) –
Ease of install due to the videos. I’m probably a 1/32 off but the zrt 15lb spring fits perfectly. My PDP compact shoots fast. So little recoil is felt. Follow up shots are like immediate. My red dot barely moves when shooting. Shipping was really fast to. Got here two days early even..
JOHNNY JACKSON (verified owner) –
I purchased the ultra flat face comp. Its fit and finish is great. There was a noticeable difference in how flat my firearm now shoots with it. Very happy with it.
tadbitnerdy (verified owner) –
Upgraded from the Pro-X PMM 1 cut comp to the ultra comp because I hate money and love freedom… Order process was smooth, and install was much simpler than I expected. Get the muschi mounting block… now my Pro-X is a Pro-X Ultra. I’ve put 500 round through it already, and it runs beautifully. Excellent work from PMM.
Wolf (verified owner) –
First and most important by a mile, the PMM comp absolutely does its job. My 4″ PDP is my daily carry. The PMM comp has turned it into an incredibly soft shooting gun. I couldn’t be happier. There are new things to deal with, though: my 4″ gun has become a 5″ gun. For me that meant new holsters, a bigger gun vault, and more parts means more things to clean (I clean after every session at the range). These are expected trade-offs, not downsides. Absolutely worth it in every way. Additionally, when I had questions after receiving the comp, Parker answered them quickly, completely, helpfully, and kindly. I wouldn’t hesitate to buy from them again. In fact, the whole experience from top to bottom has been so fantastic that I put myself on the list at my favorite gun store for the Walther PDP F-series Pro X PMM. A smaller gun with a Parker Mountain Machine compensator designed together with Walther and built in. PMM has become one of my very favorite companies to deal with, and one of my very favorite modifications to the PDP!