5.56 Custom Upper Build Kit

From: $359.00

The 5.56 Custom Upper Build Kit is perfect for DIY builders who like to assemble themselves and those who just want to pin a new upper on their lower. Designed as an à la carte package, you can choose each individual component to fit your style and needs. The base price includes the following:

  • Rosco Barrel – Black Nitride
    • 16” M4 Profile 5.56 NATO
    • 4150 CMV
    • Carbine or Mid Length Gas
  • Grendel Hunter M4E1 Upper – Black Anodized
    • AERO Precision Manufactured
    • Grendel Hunter Logo
  • Mil-Spec Forward Assist & Dust Cover
  • 12″ MLOK Grendel Hunter Hanguard – Black Anodized
    • Steel Barrel Nut
    • Mounting Hardware
  • Low Profile Gas Block – Black Nitride
  • Gas Tube (Length dependent on barrel selected) – Stainless Steel
  • A2 Flash Hider and Jam Nut – Black Nitride

NOTE: The 11″ handguards will cover a Carbine length gas system, but not a Mid Length. Other lengths will cover both. 

Customize your kit with the options below



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