KAC Knights Armament URX 4 5.56 M-LOK Forend Rail Kit – 10″


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SKU: 32304-1000 UPC: 819064016304

Product Description

The KAC URX 4 Forend 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 one-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


  • Weight: 10.08oz
  • Length: 10″
  • Inside Dia: 1.55″
  • Outside Dia: 1.68″ (side to side)




Technical Information

Caliber 5.56 NATO / .223 Remington
Color / Pattern
Firearm Compatibility

Catalog Location

California Prop 65 Warning

WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information visit www.P65Warnings.ca.gov

Customer Reviews

Based on 1 review
Nicholas E.
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