The OuterImpact 45 degree offset optic mount is able to accept 3 separate tops. The mount you are purchasing is compatible with the Aimpoint Micro optics listed below. Using the other available tops (sold seperately), the 45 degree offset mount is compatible with most major brand red dots on the market (31), and also the Trijicon MRO Standard (3) footprints. The mount only takes a couple of minutes to install on any Picatinny Rail type. The 45 degree offset optic mount is: Ambidextrous Low-profile Lightweight steel reinforced snag-less design Retains cheek weld Designed to co-witness with Magpul Back Up Offset Sights Ideal for close-range shooting An extremely stable platform for your optic The 45 Degree Offset Optic Mount is made of billet 7075 aircraft aluminum and is hard coat anodized. The 45 Degree Offset Optic Mount attaches to the rail using a steel dowel reinforced clamp. All mounting hardware is included with the exception of the Aimpoint Micro optics. The OEM optic screws must be utilized. Aimpoint Micro Compatible Red Dots: Actus Core-1 1×20 Actus Core-2 1×20 Aimpoint CompM5 Aimpoint Duty RDS Aimpoint CompM5b Aimpoint Micro H-1 Aimpoint Micro H-2 Aimpoint Micro T-1 Aimpoint Micro T-2 Athlon Midas TSR2 Blaser RD 17 Burris Fastfire RD DI Optical SP1 Holosun 403 models Holosun 503 models Holosun 515 models Holosun 530 models Kahles Helia RD-C MAKdot S 1×20 Minox RV1 Primary Arms SLX Advanced Rotary Knob Primary Arms SLX MD-20 Sightmark Element Mini Solar Sightmark Wolverine 1×23 CSR Sightmark Wolverine 1×28 FSR Sig Sauer Romeo4 Sig Sauer Romeo5 Sig Sauer Romeo-MSR Swampfox Liberator 1×22 Vector Optics Centurion 1×20 Vector Optics Maverick 1×22 Vector Optics Maverick 1×22 Gen II Vector Optics Scrapper 1×22 Vector Optics Scrapper 1×25 Vortex Crossfire Vortex Sparc