About this item Make sure this fits by entering your model number. Aluminum Warranty: We offer 3 months money back/replacement guarantee, 12 months defected product replacement warranty. Dual Aiming Aperture- Rear sight has dual aperture for quick target acquisition with windage adjustment, perfect for short and long distance target. Easy Installation on Rail - Allen wrench included, low profile iron sight set designed to mount on standard rails.no need any batteries to make it work. Quick to deploy with flip-up design, simply push the button and folded down, they must be manually flipped up( spring assisted pop-up), allowing for quick deployment,rear sight Windage adjustable New type of optical fiber sight, we have applied for patent protection in the United States, which is irreplaceable and unique.