Image 1

KAC - Knight's Armament URX 4 IBN Rail 5.56mm 14.5" Length

Current Stock:
Related Products
Product Videos
Also Viewed
By Category
Other Details
  • Product Description

    URX 4 The URX 4 is a continuous top-rail system that utilizes the Keymod mounting brackets developed by Vltor and Noveske. This rail system is built stronger and more stable than previous designs due to the absence of a removable bottom rail. The modular layout allows an end user to fully customize exactly where to place accessories without the use of specialized tools, small parts, or additional forces applied to the barrel. The URX 4 is currently available for 5.56 rifles in 8.5”, 10”, 10.75", 13”, and 14.5” lengths, and is equipped with Knight’s unique IBN mounting configuration. The idea was to create a more modular, and thus more serviceable, rail system that still maintains its strength and stiffness. Th 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. It is not suggested to use this rail with a 14.5" or shorter barrel unless using a muzzle device such as the AAC flash hider which can be installed from the end with a tool.

  • Product Reviews

  • Product Videos

    • URX 4 Installation & History of the Rail System - Knight's Armament Titusville Trey Knight http://www.k...

    URX 4 Installation & History of the Rail System - Knight's Armament Titusville Trey Knight Trey Knight talks about the history of Knights Rails, and Jack Luba demonstrates installation of a Integrated Barrel Nut rail. URX 4: Knights newest rail in the URX family! Key features: Continuous top rail, free floating one piece design, 7 sided Keymod attachment points, and Integrated Barrel Nut. A full array of accessories are available, in addition to universal compatibility with the industry standard Keymod accessories. Knight's Armament was founded over 30 years ago as an R&D firm, specializing in products which met the needs of U.S. Special Operations troops. A foundation was laid which focused on providing highly efficient gear which solved real problems and functioned in an effective and intelligent manner. That same foundation is utilized today in the designing and manufacturing of our military weapon platforms. Every weapon that is offered in our Commercial and Law Enforcement lines is a direct modeling of those military platforms. The very same materials, machines, and personnel that go into the production of our military platforms are used in the production of these Commercial and Law Enforcement weapons. This means that the reputable consistency and reliability is available to everyone who handles a weapon from Knight's Armament Company. For more information please visit, contact your local dealer, or contact the Knight's Armament Sale's Team at or call 321.607.9900. Knight's Armament Co. 701 Columbia Blvd. Titusville, FL 32780