The Primary Arms Mini Reflex Micro Prism Offset Mount connects your SLx 3x MicroPrism mount and acts as a built-in host for almost any mini reflex sight. The Mini Reflex Prism Offset mount features a 32.5 degree angle offset, and is compatible with all glock mos pattern adapter plates, making it easy to connect almost any reflect sight as a backup to your main MicroPrism optic. FeaturesConnects to MicroPrism opticCompatible with all glock mos pattern adapter platesActs as a built in host for almost any mini reflex sightDurable design that is built to last 32.5 degree offset