*Fully windage and elevation adjustable and lockable; Unlimited Eye Relief. Multi Illumination Settings. Powered by a lithium CR2032 battery*This Huracan Green Dot Sight fits directly to Optics Ready pistols that does not need to remove rear sight such as Glock MOS, Springfield OSP.*However the front switch of the sight needs to trim down 2mm depends on exact pistol model if the pistol's pre-cut is very short..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