Monstrum Tactical S120P 1x Ultra-Compact Prism Scope Ultra compact prism sight with 1x magnification and 20mm objective lens, Ideal for close quarter tactical situations and rapid short range target acquisition out to 100+ 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 with illumination in multiple brightness levels Unlike red dot sights, the reticle is visible with or without illumination, making it usable with or without battery power Only 10 ounces in weight and 4.3 inches in length, it makes for a lightweight low profile addition to your tactical rifle, or shotgun