The FN 509 Compact Tactical is easily deployed as an everyday carry. The pistol features the FN Low-Profile Optics Mounting System that accepts nearly all commercial miniature red dot optics; blackout iron sights that co-witness; cold hammer-forged threaded barrel compatible with most popular aftermarket accessories like compensators or suppressors; interchangeable backstraps; Picatinny rail; fully ambidextrous slide stop lever and magazine release.