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AR-15 Parts and Accessories > URX 4 5.56 IBN 14.5" Rail Assembly - Keymod

Sale Price: $299.75 $293.75 USD
SKU: kac-30742
P/N: 30742
Availability: Out of stock.
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Rating: ★★★★★
(Average score of 5 with 1 reviews.) Add Review

The URX 4 is a  free-floating, continuous top rail is manufactured with the Keymod mounting system and is built stronger and more stable than previous designs due to the absence of a removable bottom rail. Another key feature to the URX 4 is the Integrated Barrel Nut (IBN). The IBN system torques the rail onto the weapon and allows the rail to act as the barrel nut. This design was developed to increase stabilization and provide a simpler solution that requires less specialized tools to install and maintain. A full array of modular accessories, iron sights, and panel kits utilizing the Keymod mounting brackets have been developed specifically to accompany this rail system. With the introduction of the URX 4, Knight’s Armament Co. demonstrates its continuing determination to intelligently design effective products.


Author: Knight's Armament (KAC) URX 4 5.56 IBN 14.5" Rail Assembly - Keymod - Rating: ★★★★★ 5/5 Posted:
Title: Best Rail

Best rail out there -- integrated barrel nut is awesome, the ergonomics and weight are superior, and fully modular with keymod (or the MLOK version too). Have had this and another URX 4 for a while now, and it's all I want.