FN 510/545 Tactical holster made by Watchdog Tactical is one of the best options available on the market today. With multiple carry options such as Outside the Waistband(OWB), Inside the Waistband(IWB), Quick Locking Systems (QLS), and light bearing. Each holster is custom-made for each specific gun, ensuring a perfect fit and positive retention. These holsters also allow the user to modify the tension of the holder in the weapon with a simple tightening or loosening of a screw. Our holsters offer a minimalist design and add almost zero bulk to the weapon's overall size, increasing comfortability and decreasing visibility while carrying. All Watchdog Tactical holsters are proudly made in the USA by veterans.