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The W.A.R 509 compensator for the FN 509 pistols was designed to mitigate recoil by directing the expelled gas up as it vents through the carefully engineered port. The port geometry was designed to slow the erosion caused by the powder blast from each shot. The crown geometry will also keep any spent casing from making it to the bore, eliminating the danger of shooting through the spent brass.

The compensator will come with setscrews and brass ball bearings. The brass bearings are inserted before the setscrews. This allows the bearings to form to the barrel surface and allow better tension on the set screws. The brass bearings will also prevent marking the barrel. Viton O-ring's and thread locker will be supplied along with a hex key.

 * OEM FN 509 Tactical low power yellow spring required to run reliably. (comes with the FN 509 Tactical)

 * Tuning with different ammunition may be required.

 * Color may vary slightly from picture.

Additional Details


7 Reviews

  • 5

    Published by Damon Webb on Dec 22nd 2019

    A beautiful addition to a Tac slide - follows the lines & contours perfectly! For best results, lower grain +P ammo recommended for flatter shooting.

  • 5

    Published by WuChang on Dec 11th 2019


  • 5
    W.A.R. 509 Comp

    Published by Pablo on Dec 10th 2019

    Looks Bad Ass , and actually WORKS!
    Proven Facts! Faster follow up shots , less felt recoil . All around extremely pleased.!

  • 5
    BiFrost Beauty!

    Published by Sean Ngo on Sep 10th 2019

    Easy to install, fits great. Bifrost looks super nice with the FDE 509 Tactical. Quality made product. Been waiting forever to get the Bifrost model.

  • 5
    WAR fn 509 comp

    Published by Russell on Aug 13th 2019

    Hard to find in stock, but snatched a black one while it was available, simple installation with everything included which is always nice, amazing fit and finish perfectly machined seamlessly matches the slide. Not only looks great but functions as well( REMEMBER TO USE THE YELLOW SPRING) cycled 115gr bulk no problems and with noticeably less muzzle flip. I'll own 2 if I see the bifrost available when I'm checking for the rmr guard.

  • 5
    It’s effective!

    Published by brandon jones on Jul 18th 2019

    Works really well to reduce muzzle rise. Highly recommended. When I had questions about installation I received a phone call within 5 minutes of sending an email. Great customer service too.

  • 5
    509 Comp

    Published by Chance Wray on Apr 16th 2019

    Fucking awesome

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