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Parker Mountain Machine FN 509 Duty Compensator on a FN

AI illustration of a similar part on the gun.

FN · Compensator

Parker Mountain Machine FN 509 Duty Compensator

$100

Build with this part

Opens the builder with this part fitted. Other parts change only if they have to.

Specs

Calibers9mm
Thread1/2x28
FitsFN 509 Tactical

Pros and cons

Pros
  • No set screws, shim-timed mount
  • Captured design stays put if loose
  • 7075 aluminum
Cons
  • Often sold out

Works with

Works with: 9mm.

Other compensator options