Open Box KAC Knights Armament Free Float MRE Rail Kit w/Filler Rail Kit – 12″

Used/Open Box Item: This product is not eligible for return. Click to learn more about used products.

Original price was: $512.00.Current price is: $462.93.


Product Summary

Knight’s Armament RAS MRE-Model B Rail kit is now available as a limited edition release from KAC’s “vault” program. The design of the MRE handguard came together to integrate with the SOPMOD Block 1 kit, issued to US military in the early Global War on Terror.

  • Free-float design fits the M4A1 barrel to increase accuracy with minimal heat transfer
  • Top rail aligns with M4/AR upper receiver
  • MRE barrel nut is extra rigid to support the added weight of commonly used SOPMOD accessories such as lights, lasers, and optics
  • Compatible with the EGLM Enhanced Grenade Launcher Module
  • Upper and Lower rails reverse for lower mounting of PEQ-2, keeping the laser below the BUIS line of sight


Technical Information


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