Out of stock
Knights Armament URX 4 5.56 Rail 13" MLOK Rail Adapter System, Black - 32304-1300
Out of stock

Knights Armament URX 4 5.56 Rail 13" MLOK Rail Adapter System, Black - 32304-1300

SKU 802196
Model Number 32304-1300
Brand Knight's Armament Co
UPC 819064015994
This product is fulfilled by a PSA Partner and shipping times may vary.
Customers must read Compliance Information before purchasing.

Product Details


Manufacturer: Knights Armament Company
Model: URX 4
Color: Black
Accessories: Includes Shim Set and Wrench
Description: M-LOK Rail Adapter System
Size: 13"
Model: 5.56 NATO


Knights Armament Co.'s URX 4 13 inches M-LOK Forend Assembly Kit is a fully modular design that utilizes the revolutionary M-LOK accessory mounting system. The URX 4 Rail is stronger and more stable than previous URX designs due to its 1-piece construction. It is also lighter due to its Integral Barrel Nut (IBN) system of attachment. The IBN system allows the rail itself to act as the barrel nut when torqued onto the rifle completely eliminating the need for a separate steel barrel nut. M-LOK accessories may be mounted anywhere along the URX 4's length making it one of the most user configurable designs on the market.


  • Each URX 4 rail comes complete with an installation wrench shim kit and instructions
  • 13 inches M-LOK forend Kit


Q & A


Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.