Is the FN 509 Tactical a TRUE Glock Killer??
This guide details the process of mounting an aftermarket red dot sight onto the FN 509 Tactical, emphasizing its unique O-ring system that negates the need for Loctite. It covers selecting the correct plate and screws, and the importance of ensuring the firearm is unloaded before starting. The FN 509 Tactical's modularity is highlighted, allowing for various optic and accessory configurations.











