FN M16A4 Upper NOS


Out of stock

Out of stock

SKU: FNUPPER-5 Category:


FN M16A4 factory original uppers, Charging Handle and BCG are included. These are in NOS condition with some minor handling marks. The upper includes an original FN USGI Mil Spec chrome lined 20″ cage coded barrel with 1/7 twist, Knight’s Armament M5 RAS Picatinny hand guard assembly with Knight’s Armament rail covers and a removable M16A4 carry handle. These uppers are identical to those issued to the USMC. We have saved you the trouble of sourcing all of the correct components and provided great place to start in building a first class build.


  • Barrel Length: 20″
  • Gas System: Rifle length
  • 1:7 twist rate
  • Chrome Lining: Yes
  • Muzzle Thread: 1/2×28
  • Chamber: 5.56×45 NATO
  • Gas Block: Standard Front Post gas block/sight
  • Muzzle Device: A2 Flash Hider
  • Handguard Type: Knight’s Armament M5 RAS

Additional information

Weight 6 lbs
Dimensions 32 × 6 × 6 in


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