Upgrade your FN 509 with the cutting edge of performance with the FN Compensator Accessory Kit. First introduced on the FN 509 CC Edge the compensator’s unique quick-detach (QD) design allows for toolless install and removal from the proprietary non-threaded QD barrel in a matter of minutes no gunsmith or factory service required. – The FN Compensator significantly decreases felt recoil and features v-style ports on either side that vector gases and flash out of the user’s field of view. The result is a shooting experience that is flatter and more controlled allowing users to maintain a consistent sight picture from shot to shot. – Specs – Caliber: 9MM – Finish: BLACK BARREL AND PVD FINISH ON THE COMPENSATOR – Twist: 1:10 – Overall Length: 4.55 midsize – PRIMARY FEATURES – Reduces muzzle rise up to 25% – No shims or threading required – Reduces felt recoil – Helps with follow-up shot speed – Directs muzzle blast up and outward to prevent sight obstruction – Easy takedown and cleaning – Machined from stainless steel and coated with a robust PVD finish the compensator is extremely durable and is designed to withstand hard use across standard and self-defense loads for the widest degree of compatibility while still utilizing the factory FN 509® recoil spring. – FN Compensator Accessory Kit is available in models compatible with FN 509 Standard Midsize and Compact models. It ships with the compensator and proprietary non-threaded QD barrel.