*Water, shock and fog resistant. The lenses are precision ground and polished to precise geometries to virtually eliminate parallax and provide a very clear and sharp image.*This red dot comes with a Picatinny mount base. It is also compatible with different pistol mounting plates that replace the rear sight dovetail. *Fully coiled and adjustable, lockable elevation; unlimited eye relief. 5 MOA. 5 lighting settings. Powered by a CR2032 lithium batteryThis ADE RD3-009, alone with RD3-006,RD3-012,RD3-013 do NOT fit Springfield HELLCAT OSP, because springfield Hellcat OSP red dot footprint is based on Shield RMS. ADE sights has the footprint of Doctor/Vortex Venom type footprint. This RD3-009, and RD3-006, RD3-012 and RD3-013 fits directly to "e;Optics Ready"e; pistols such as Glock MOS, Springfield OSP(non-hellcat), Canik TP9 SFX(non elite sc), Walter PPQ Q5 Match, FNX 45 Tactical, IWI Masada handguns that come with mounting plates that marked for DOCTOR/VORTEX VENOM type red dot. All mentioned above pistols must to be OPTICS READY model that comes with MOUNTING PLATE marked for DOCTOR/VORTEX.