JahyShow Red Green Dot Sight Reflex Holographic Tactical Riflescope 4 Reticle Patterns With 20mm Free Mount Rails Black "*Tubeless design with 33mm reflex lens aperture provides a wide field of view, suitable for rapid-firing or shooting of moving targets besides normal shooting Multi-Reticle (4 patterns) or variable Dot (4 different sizes) are installed " *Unique Design: Tubeless design with 33mm reflex lens aperture provides a wide field of view, Excellent choice for rapid-firing and moving targets *Multi Reticle Reflex Sight: Multi-Reticle (4 patterns) or variable Dot (4 different sizes) are installed, it is useful for almost any application from close quarter combat situations to hunting *Standard Base: Bulit-in picatinny mount for standard 20mm rail bases for easy sight remounting, no need to rezero when remounting the dismounted sight *GOOD EYE RELIEF - With the different reticle settings and adjustable brightness, it offers great eye relief and a clear sight