BCA/AR-15 5.56 NATO, 16” Parkerized M4 Barrel, 1:8 Twist, Carbine Length Gas System, 15” MLOK Rail|Upper

$428.99 $399.99

Out of stock

SKU: 617-UA556CM41618P-15MLOK3 Category:


This BCA AR-15 Complete Upper has a 16″ barrel with an M4 Contour profile, made of 4150 Chrome Vanadium with a Parkerized finish, and features a 1:8 Twist Rate, a Carbine length gas system

The Upper includes a 15″ MLOK Rail, an M4 flat-top forged upper receiver with forwarding assist, a BCA Bolt Carrier Group, a Flash Hider, and a Charging Handle. It is chambered in 5.56 NATO and machined with M4 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.

*Note – We strive to provide the most accurate photographs of our product. Variations may occur in the skeletonized section of the handguard/flash hider you receive.


WARNING: This product can expose you to chemicals, such as lead and other petroleum products, which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.  For more information go to

SKU    617-UA556CM41618P-15MLOK3

Weight            5.2500

Length             16

Profile M4 Contour

Twist   1:8

Finish Parkerized

Material           4150 Chrome Moly Vanadium

Thread Pitch    1/2 x 28

Caliber            5.56 NATO

Feed Ramp      M4

Flutes N/A

Gas System     Carbine

Gas Block System       0.750

Gas Hole Diameter     0.070

Charging Style            Rear Charging

Color   Black

Dimpled          Yes

Product Type Complete Upper Assembly

Magazine Capacity     N/A

Platform          AR-15


Additional information

Weight 4.8 lbs
Dimensions 22 × 4 × 4 in


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