The FN America 509 Compensator Accessory Kit (brand part no. 20100809) brings the quick-detach compensator first seen on the FN 509 CC Edge to the standard, Midsize, and Compact 509 models. The kit’s proprietary non-threaded QD barrel and compensator install and remove in minutes with no gunsmith and no shims or threading required. Machined from stainless steel and coated with a durable PVD finish, the compensator uses v-style ports on either side that vector gas and flash out and away from the shooter’s line of sight. FN states the design cuts felt recoil and muzzle rise by as much as 25 percent, helping shooters get back on target faster between shots while still using the factory FN 509 recoil spring.

Key Specifications

• Chambered in 9mm, matching the FN 509 family’s factory chambering.
• Measures approximately 4.55 inches overall in the midsize configuration.
• Uses a 1:10 twist rate barrel.
• Finished with a black barrel and PVD-coated compensator.
• Installs with a toolless, non-threaded quick-detach mount, requiring no gunsmith.
• Reduces muzzle rise by up to 25 percent according to FN, aiding faster follow-up shots.
• Compatible with FN 509 Standard, Midsize, and Compact models.
• Reduces felt recoil in addition to muzzle rise, helping maintain a consistent sight picture between shots.
• Works with the factory FN 509 recoil spring, requiring no additional spring changes.

Frequently Asked Questions

Do I need a gunsmith to install this kit? No, the proprietary QD barrel and compensator install and remove without tools or a gunsmith.

Which FN 509 models is this kit compatible with? The FN 509 Standard, Midsize, and Compact models.

Does this kit use the factory recoil spring? Yes, it is designed to work with the factory FN 509 recoil spring.

Buy the FN 509 Compensator Accessory Kit

Order this FN compensator kit from our Lubbock, Texas gun shop, and it will ship as soon as it is ready to send. Browse more handgun barrels while you plan your next upgrade.