ARO (Advanced Rifle Optic) is an advancement on the popular 20mm 403 and 503 series optics. ARO features an all-new 22mm housing design that mates perfectly with the magnifier series and an all-new 1.63 lower 1/3 co-witness pedestal mount. ARO is available as a 2MOA dot only or with the Multi-Reticle System (MRS) in Red, Green, or Gold. Includes: 1x ARO-MRS-GD Optic, 1x 1.63 in Optic Mount, 1x 1.05 in Optic Mount, 1x Multi-tool, 1x Wrench, 1x Cleaning Cloth