Fiber Optic Sights, Flip Up Front And Rear Backup Sights With Green Red Fiber Product Features ZBULAR flip up collimator is designed with bright red and green dots for remote aiming and non flipped close combat fiber optic aiming for quick aiming, making it easy to quickly and accurately aim the target. This design can improve visibility and help you improve aiming accuracy and apply it to more modes of entertainment ZBULAR flip up sights with spring-loaded foldable parts and Allen wrench, easy to mount and flip up/down. Simply press the button to flip up fastening the front and backup sights on the rail with the Allen wrench accessory attached in the case. The flip up sight is a great aiming optic equipment accessory, easy for you to mount and use Rotating the gear under the front sight aperture to adjust sight elevation to get the best visual targeting effect; rotating the rear sight knob to move the sight wintage aperture left or right; When the sight is not flipped up, it can be directly used for fiber optic aiming to quickly enter close combat aiming. After flipping up, it can be used for medium to long range aiming, suitable for all outdoor modes Light durable fiber optics sight polymer fiber optic front and backup sights, light in weight and portable for you to carry; solid and durable construction, designed to increase sight steadiness and accuracy as much as possible while sparing your problem of iron corrosion Please be careful when install and use these flipup sights, avoid hurting your hands; these sights are compatible with Picatinny rails in specs; you will receive a case within the package includes 1*front sight with red dot,1*backup sight with green dots, and 1*Allen key wrench accessory; any suggestions and problems with these fiber optic flip up sights, please let us know, we will provide you with satisfactory solutions Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!