5.56 NATO (Will also shoot .223) Complete Upper Assembly, Standard Hand Guard, 16 Inch Nitride Barrel. Includes bolt carrier group and charging handle. This upper assembly is Bear Creek Arsenal’s standard feature mil spec upper with a 1/8 twist and an upgraded nitride barrel which is chambered 5.56 NATO.
The BCA upper assembly, like all BCA products, is subjected to numerous QA/QC checks which for our firearms and upper receiver assemblies includes test firing prior to approval and shipment. This upper assembly is also backed by our BCA limited lifetime warranty. Choose an upper assembly designed by a U.S. company and made in the U.S.A. Choose BCA.
BCA DOES NOT recommend using steel cased ammo in our Assemblies or Rifles.
|Material||4150 Chrome Moly Vanadium|
|Thread Pitch||1/2 x 28|
|Gas Block System||0.750|
|Gas Hole Diameter||No|
|Charging Style||Rear Charging|