Click to expand Tap to zoom Avengers B-18 AK-74U Rear Sight Rail Insert by Avengers Out of Stock $29.99 SKU 5KU-275-BK 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Out of Stock Features High durability aluminum alloy construction Mounts to rear sight block to add space for attachment of optics or other accessories Adds minimal bulk to your rifle