Knight's Armament URX 4 AR-15 Handguard - M-LOK - 8.5"

Manufactured by Knights Armament Company
SKU: KAC32304-1000
MPN: 32304-1000
Manufactured by Knights Armament Company
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The Knight’s Armament URX 4 M-LOK Rail is a one-piece, fully modular system. With its Integral Barrel Nut system, the URX 4 is a stronger, lighter improvement over previous URX designs. The IBN system allows the rail itself to act as the barrel nut when torqued onto the rifle, 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.

  • Installation wrench, shim kit and instructions. 
  • Length: 8.5"
  • Inside Diameter: 1.55"
  • Outside Diameter: 1.68" (Side to Side)
  • Weight: 9.2 oz
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Accessory AttachmentM-LOK
BrandKnights Armament Company
FinishHardcoat Anodized
Gas System LengthExtended Mid-Length
Handguard Length10
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 go to

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