FN M16A4 upper receiver group, NOS

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FN M16A4 upper receiver group, NOS

authentic military New Old Stock (NOS), this is the M16 URG that is used by US Military

FN M16A4 factory original upper.  The upper receiver group is  are in new old stock with some minor handling marks. The upper includes an original FN USGI Mil Spec chrome lined 20″ CAGE coded barrel with 1/7 twist, a mil-spec. M5 RAS Picatinny hand guard assembly with rail covers and a USGI MaTech 600 meter rear sight. 

Note:  This is military grade.  Expect handling marks.  This is not pristine commercial finish.  FN builds M16 rifles for battle, not to showcase.


  • Barrel Length: 20″
  • Gas System: Rifle length
  • 1:7 twist rate button broached military barrel
  • Chrome Lining: Yes
  • Muzzle Thread: 1/2×28
  • Chamber: 5.56×45 NATO
  • Gas Block: Standard Front Post gas block/sight ("F" height)
  • Muzzle Device: A2 Flash Hider
  • Handguard Type: M5 RAS from P&S Products, the official Government contractor for this rail and covers
  • milspec bolt carrier group (from Government contract, not marked FN)
  • milspec charging handle
  • packed in milspec sealed plastic heavy with oil on the barrel and receiver assembly

Pictured is the complete FN rifle.  P&S vertical grip is not included, but can be added here