Arc Division Edge 509 Pistol Compensator 9mm .5x28 Anodized Black. The Edge509 will help you shoot flatter and faster in all situations. We offer our comp threaded in the standard 1/228 threaded barrels. Specifications for Arc Division Edge 509 Pistol Compensator: Manufacturer: Arc Division Color: Black Fabric/Material: 7075 Aluminum Threads per Inch: 1/2x28 Gun Make: FN Herstal Gun Model: FN 509 Length: 0.94 in Weight: 0.9 oz Condition: New Fit: FN 509 Optics Ready Projectile Caliber: .355 Caliber Features of Arc Division Edge 509 Pistol Compensator Slide countoured shape Single top port compensator Guiderod cover FN509 family specific Package Contents: Arc Division Edge 509 Pistol Compensator Threadlocker Allen Key Set Screws Instruction Sticker What firearm models does the manufacturer say Arc Division Edge 509 Pistol Compensator is compatible with? The manufacturer suggests that Arc Division Edge 509 Pistol Compensator is compatible with FN 509Arc Division 11363: Edge 509 Pistol Compensator 9mm .5x28 Anodized Black