BCA AR-15 Side Charging Complete Upper 16” 4150 Black Nitride M4 Contour Barrel, Straight Fluted, 6.5 Grendel, Carbine Length Gas System, 1:8 Twist w/ 10” MLOK Rail

Special Price $253.90 was $362.71
In stock


  • 16" M4 Contour Barrel
  • 4150 Chrome Moly Vanadium 
  • Black Nitride Finish
  • Straight Fluted
  • 1:8 Twist
  • 10" MLOK Rail
  • 6.5 Grendel Type II 
  • Carbine Length Gas System
  • Billet Side Charging Upper Receiver
  • Charging Handle

This BCA AR-15 Side Charging Complete Upper  has a 16" M4 Contour barrel made of 4150 steel with a Black Nitride finish and a 1:8 twist rate. The assembly includes a 10" MLOK, a billet side charging upper receiver, bolt carrier group, flash hider and charging handle. It is chambered in 6.5 Grendel type II and machined with .300 black out feed ramps in the barrel extension.

This BCA AR-15 Complete Upper, like all BCA products, is subjected to numerous QA/QC checks which for our firearms and complete upper receiver assemblies includes test firing prior to approval and shipment.

Choose an upper designed by a US company and made in the USA. Choose Bear Creek Arsenal.

More Information
SKU UASC6.5CM41618(MF)-(10)MLOK3
Length 16
Profile M4 Contour
Twist 1:8
Finish Black Nitride
Material 4150 Chrome Moly Vanadium
Thread Pitch 5/8 x 24
Caliber 6.5 Grendel Type II
Feed Ramp .300 Blackout
Flutes Straight Flutes
Gas System Carbine
Gas Block System 0.750
Gas Hole Diameter 0.070
Charging Style Right Side Charging
Product Type Complete Upper Assembly
Platform AR-15