The FAB Defense OPMOD Rear Polymer Flip-up Rear Sight can be your current optic's primary or backup sight. OPMOD designed these AR 15 Parts with ergonomic angel-wing-shaped shrouds that help center the image with any front sight so that you can accurately use these in conjunction with a front backup sight or other optics. With an instant spring-locked mechanism for deployment, the FAB Defense RBS will never slip, break, or deform, offering outstandingly reliable performance in the field. Equip the FAB Defense Rear Back-Up Sight on your weapon today for precise views down range every time.The FAB Defense OPMOD Rear Polymer Flip-up Rear Sight is adjustable for windage and elevation. This means it can be easily fine-tuned to match your specific shooting requirements and adapt to various shooting distances. The windage and elevation adjustments are user-friendly, making it easy to achieve precise aiming. The sight's low-profile design allows it to sit close to the bore axis of the firearm, reducing the sight radius and improving target acquisition speed. This design is handy for quick and accurate target engagement in tactical or competition shooting scenarios.The FAB Defense OPMOD Rear Polymer Flip-up Rear Sight is popular among firearm enthusiasts seeking a lightweight, durable, and versatile rear sight. Its ease of adjustment, low-profile design, and dual aperture system make it a practical and reliable addition to various firearms, whether for sport shooting, competition, or tactical applications. With a focus on affordability and robust construction, this rear sight is a compelling option for those looking to enhance their shooting experience.Specifications for FAB Defense OPMOD Rear Polymer Flip-up Rear Sight:Manufacturer:OPMODColor:GreyGun Make:AR PlatformFabric/Material:PolymerHeight:14 mmLength:52 mmFeatures of FAB Defense OPMOD Rear Polymer Flip-up Rear SightCan be used as primary or back-up sightErgonomic angel-wing-shaped shroud helps center the image with any front sight, and when used with a matching FAB Defense FBS Front Back-up Sight, it creates a precise optical tunnel that ensures more accurate aiming and faster target acquisitionDual apertures are 3mm for longer eye relief mounting, low light, and faster target acquisition; and 1.5mm for shorter eye relief mounting and greater accuracy; each is instantly selectable to match conditionsLow folded profile is smooth and inconspicuous, and will not snag on gear, webbing, or brushInstant spring-locked deployment mechanism will not slip, break or deformNo tools needed for easy, rapid windage adjustments, with positive detent lockingMade of extremely durable high-grade polymer and metalPackage Contents:FAB Defense OPMOD Rear Polymer Flip-up Rear SightFAB Defense OPMOD FX-RBS-OPMOD Grey: Rear Polymer Flip-up Rear Sight, Grey