FN M16A4 upper receiver group, Military Collector Series take-off

ships from our shop in 3 to 5 days (+/-)

FN M16A4 upper receiver group

new FN upper receiver group, this is the M16 upper, taken off the Military Collector Series Rifle

FN M16A4 factory original upper.  The upper includes an original FN USGI Mil Spec chrome lined 20″ barrel with 1/7 twist, a mil-spec. Knights Armament M5 RAS Picatinny hand guard assembly with rail covers.  A MaTech 600 meter rear sight is included.

Note:  This is collector grade.  This upper is new production from FN's Military Collector Series.  The FN 15® Military Collector Series M16 is a military replica rifle made to FN’s exacting specifications. The semi-automatic rifle is chambered in 5.56x45mm NATO and features a 20-inch, 1:7″ RH, button-broached, and chrome-lined barrel.


  • 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 Knights Armament
  • Rear mil-spec read back-up iron sight 600m from Matech / Picatinny Engineering
  • milspec bolt carrier group
  • milspec charging handle
  • packed in milspec sealed plastic heavy with oil on the barrel and receiver assembly

Pictured also is the complete FN rifle.