*Lenses are precision ground and polished to exacting geometries to virtually eliminate parallax and to provide a very clear, crisp sight picture.*This GREEN dot comes with a picatinny mounting base*3 MOA. Fully windage and elevation adjustable and lockable; Unlimited Eye Relief. Multi Illumination Settings. Powered by a lithium CR2032 battery(Included)This ADE RD3-006, alone with RD3-009,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 RD3-006, and RD3-009, 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.