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PMM 509 Competition Combo: Ultra Comp & Duty Magwell Combo w/ Muschi (Full Sized Only)


Product Details

Maximize performance out of your FN 509 Tactical Full Size with our Competition Combo



1x PMM 509 Ultra Compensator for Factory Threaded (1/2 x 28) Barrels

  • 7075 Aluminum finished in a type 3 class 2 hardcoat anodize.
  • No set screws, mounts like a muzzle device on a rifle.
  • Captured design ensures that even if your comp comes loose it will not come off or impede function.
  • Designed around the FN factory threaded barrels (1/2×28) but will work with others that have the same threads. (Gap may vary)
  • Technology born and improved upon from our PMM X-Comp pistol.

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

1x PMM 509 Muschi Mounting Block

1x PMM 509 Duty Magwell for Full Sized 509 

  • 8625 type 3, class 2 hardcoat anodize
  • Machined in-house out of 6061 aluminum
  • Works with both factory FN standard and extended magazines


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


  • Federal American Eagle
  • Speer Lawman
  • Wolf
  • Remington UMC
  • Sig Sauer
  • Fiocchi


  • Blazer
  • Speer Lawman
  • Federal American Eagle
  • Sig Sauer
  • Winchester
  • PMC
  • Remington UMC


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




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