The Blackout Defense OneX Micro red dot riser mount features a 1.93" or 2.30" optical centerline height for rapid and upright sight alignment that is especially useful with tactical equipment such as night vision goggles, gas masks, and headsets. The 2.3" riser also features a large EDM-cut window that provides an unobstructed view of both your front and rear backup iron sights in case of optics failure due to battery depletion, debris, or physical damage. Machined from 7075 aluminum and hard coat anodized, selected cerakote finishes are applied over the anodize layer for added corrosion resistance. OneX Optics mount Compatibility list: Actus Core-1 1A-20 Actus Core-2 1A-20 Aimpoint Comp M5 Aimpoint Comp M5b Aimpoint Duty RDS Aimpoint H1/H2 Aimpoint T1/T2 Athlon Midas TSR2 Blaser RD 17 Burris Fastfire RD Bushnell: TRS-25 Bushnell: TRS-26 Bushnell: TRS-125 DI Optical SP1 Holosun: 403 (including B, C, GL, and R models) Holosun: 503 (B, BU, C, CU, FL, G, GU, R) Holosun: 515 (C, CM, CT, GM) Holosun: 530 (C, G) Kahles Helia RD-C MAKdot S 1A-20 Minox RV1 Primary Arms: SLx MD-20, SLx Advanced Sig Sauer Romeo - MSR (Including Gen II Elite) Sig Sauer Romeo 4 series (S,H, T ,XT-Pro models) Sig Sauer Romeo 5 series (including Gen II Elite) Sig Sauer Romeo 7S Sightmark Element Mini Solar Sightmark Wolverine (CSR, FSR) Swampfox Liberator (including Gen II) Vector Optics Centurion Vector Optics Maverick (including Gen II) Vector Optics Scrapper (including 22mm, 25mm) Vortex: SPARC Solar Vortex: Crossfire (Red, Green) US Optics: US Optics TSR-1X Zerotech Thrive Features Opening allows for full use of iron sights without removing optic Compatible with all micro footprint devices EDM-cut window for clear view of backup irons Direct mount design Specifications Height: 1.93" or 2.3" to centerline of optic Mounting: T25 Hex Screws Finish Options: Clear Anodize, FDE CerakoteA(R), Burnt Bronze CerakoteA(R), Primordial Green CerakoteA(R), Space Grey CerakoteA(R), or Black Nitride Materials: 7075 Aluminum