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PMM 509 Ultra JTTC for 509 Tactical/509 Compact Tactical



Would You Like An Extra Shim Kit?

Yes (No Loctite 272)
Yes (With Loctite 272)

PMM JTTC "Muschi" Mounting Block

Product price: $150.00
Total options:
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Product Details

The PMM JTTC Ultra Compensator for the FN 509 Tactical series is here! PMM has adopted the technology from our Ultra Barrel and Comp Combo series and applied it for use on the factory threaded barrel utilized on the 509 Tactical series of pistols. While slightly larger in overall length, our new 509 JTTC Ultra still yields a 45-55% reduction in muzzle rise with 115gr ammo!

All PMM JTTC compensators mount much like what is found on all modern rifles utilizing a combination of shims and proper timing of the compensator in relation to the Pistol slide.

The PMM JTTC ULTRA for the FN 509 Tactical and Compact Tactical utilizes a dual port design at the 12 O’clock position which maximizes the effectiveness of the compensator in keeping the muzzle of the pistol down and allows the slide to “track” faster and more accurately for follow up shots.

The PMM ULTRA JTTC was designed to work with most factory loaded ammunition and yields and average 45-55% reduction in muzzle climb with 115gr UMC!(please refer to testing charts at the bottom of the product page)

We have adapted our designs to integrate with and complement the design of your pistol so no longer does a compensator have to look like an afterthought slapped on the end of your pistol, Rather it Delivers unmatched performance and looks.

This compensator is SLIGHTLY LARGER physical size in comparison to our single port so if you have a holster, you may need to modify it to accept this compensator.

9mm Ammo known to work well with our dual port comps.


Federal American Eagle
Speer Lawman
Remington UMC
Sig Sauer


Speer Lawman
Federal American Eagle
Sig Sauer
Remington UMC

Most 147gr ammo will run but you will see less performance due to a lack of velocity


1 x FN 509 ULTRA Compensator
1 x Shim Kit:
4 x 0.010″ Shim
2 x 0.005″ Shim
1 x 0.002″ Shim
1 x 0.05mL Vial Loctite 272

*If ordering a 13.5×1 LH Metric compensator, your shim kit will include a PMM Metric Shim Alignment Rod. These are only necessary for metric barrels.*

  • 509T/CT Ultra Comp: 7075 Aluminum finished in a type 3 class 2 hardcoat anodize.
  • No set screws, mounts like a muzzle device on a rifle.
  • Designed for use with the factory threaded barrel.
  • Technology born from our PMM X-Comp pistol.
  • “Muschi” Mounting Block NOT Included. Available Under Options


Images below are of our PMM “MUSCHI” Mounting Block, This product can be found on the main page for your pistol manufactures COMP.

Additional information


Black, FDE

23 reviews for PMM 509 Ultra JTTC for 509 Tactical/509 Compact Tactical

  1. Ivan V.

    Looks and works great. Super easy to install.

  2. Jon D.

    Looks and works great, fits on the 509 FN like it came with the gun. great product

  3. Cody W.

    Ordered was shipped and delivered fast! Install went easy, after fitting with proper shimming. The install video was very helpful. The design/look are too notch and fit the factory look of my 509T perfectly!! Recoil reduction was extremely noticeable also! Awesome product and look forward to seeing what else PMM will put out! Highly recommend!

  4. Matthew B.

    Very nice piece of machining. Looks like it was added stock. Don’t recall how it shot before adding the compensator, but it shoots pretty smooth now. Fit perfectly with the included shims.

  5. Jay D.

    Great piece fit like a glove haven’t shot it yet but going this weekend.

Only logged in customers who have purchased this product may leave a review.

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