Open Box Forward Controls Design RHF4 Picatinny Handguard – 11.5″

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Flat Dark Earth (FDE)

Product Summary

RHF4 comes in two lengths, 11.5″ and 9.5″, it is a quad rail handguard based on the successful Centurion Arms C4 rail system. It is a lightweight, rugged, 2-piece free float rail that provides a continuous 12 o’clock rail when installed on the upper receiver. Like the C4 system, RHF4 is a rigid rail that clamps to a standard barrel nut on all AR15, M4, and M16-type weapons systems. This design allows the installation of the rail on an upper assembly without removing the front sight post or permanently attached muzzle devices.

  • Material: 6061 T6
  • Finish: Type 3 hard coat anodized
  • Weight: 12.40 with screws—1.1oz more with standard barrel nut
  • Length: 11.5″
  • Width: 2.1in
  • Height: 2.38
  • Inside diameter: 1.37
  • Rails: 1913 spec rail
  • Fasteners: grade 8 bolts phosphate finished
  • Made in the USA


Technical Information

Firearm Compatibility
Material Aluminum
Finish Anodized
Mounting Platform
Size 11.5"

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