***The 509 Comp is on hold while we work on improvements and revisions to the design. If you’d like to be notified when they become available, please sign up for our email list, using the form at the bottom of the home page.***
The original batch of comps were designed and machined entirely by Trost Tech, and we recalled the batch after concerns over the durability of their design.
Designed specifically for the 509 Tactical, this comp is machined out of 6061 aluminum, and hard anodized, with two top ports and two side ports. The comp is secured to the barrel with a pair of set screws from the underside. The set screws are 4-40 x 3/16, and require a 0.050in hex key (not included).
Barrel thread spec is 1/2 x 28.
*We recommend installing the Reduced Power Yellow Spring that FN supplies with the 509T for the best reliability across a range of ammo types.