Check the listing for details. HK USP .45 Pistol Mount Plate for Sightmark, Burris, Vortex Micro Red Dot Sight. Color: Black, Condition: New. Listed at 12.99 USD. OVERVIEWThe HK USP dovetail has two popular width, one is 10mm, another size is 12mm. This plate fits 10mm dovetail, it does NOT fit the 12mm dovetail. Please MEASURE dovetail before purchasing. Below is a list of HK USP models come with both size 10mm and 12mm dovetails.: USP Tactical 9mm USP Tactical .45 ACP USP 9mm USP 40 S&W USP .45 ACP (please measure dovetail before purchasing to make sure it has the10mm dovetail)KEY SPECSIt fits following micro red dots 1. Sightmark mini shot reflex sight 2. Vortex Razor/Viper/Venom micro red dot 3. Burris Fastfire micro red dot (The red dot mounting screws in the package is not long enough for some burris red dot sights, you can use the screws of the red dot to mount it.) CONTENTS1 x A (Selectable Color)NOTESThis mount does not fit: USP Compact USP Expert USP Elite