Monstrum Tactical S536P 5x Magnification Prism Scope Compact, heavy duty prism sight with 5x magnification and 36mm objective lens, Ideal for rapid mid range target acquisition out to 500 yards Features a glass prism optical system rather a refracting lens system like traditional scopes, allowing for better optical quality in a much smaller package Crystal clear optics with a black reticle and illumination in red or green in multiple brightness levels Unlike red dots, the reticle is visible with or without illumination, for a clean sight picture regardless of lighting or environment Available in Black or in Flat Dark Earth