Athlon Optics Argos HMR Compact Hunting Rifle Scope with Illuminated Reticle OptionsThe Argos HMR is a compact and versatile hunting scope featuring SFP, Side Parallax, Advanced Fully Multi coated, Capped Elevation & Windage Turrets, Illuminated Reticle options. The Argos HMR Rifle Scopes includes Advanced Fully Multi Coated lenses that provide better light transmission with optimum brightness and true color across the entire spectrum. The Argon gas has a low thermal conductivity compared to nitrogen gas, resulting in better fog