Replace a lost or broken lens cover with the factory original part that came with your Aimpoint. Protect your sight's lenses from rain, snow, dust and impact. Flip-Up Covers - Spring-loaded, hard polymer covers flip open with finger pressure. Available in solid black or see-through clear that allows fast, emergency aiming without opening the cover. Tight, friction-fit installation. Front covers fit non-magnifying (1x) 9000 and Comp series, including C3, MPS3, and M4/M4S. Rear covers fit all Aimpoints with 30mm rear objectives, including Comp and 9000 series. Mfg: Aimpoint SPECS: Fits Aimpoint Red Dot sights as indicated above. Flip-Up Covers - Molded polymer, black. Clear models have clear polymer windows in lid.