The EOTech Vudu 1-6x 24mm Rifle Scope Illuminated Green SR3-MOA Reticle 30mm Tube combines a robust 30mm tube with a 24mm objective to deliver reliable light transmission and durability across AR platforms and bolt-action rifles, featuring a Speed Ring reticle that enables rapid target acquisition at lower magnifications while preserving precision for longer-range engagements when zoomed in; the illuminated SR-3 reticle, optimized for 5.56 BDC, provides quick holdovers and improved accuracy at short to medium ranges, making it ideal for field and range use, and the hardcoat anodized black finish adds rugged protection against harsh conditions without sacrificing optical clarity or performance.