Bear Creek Arsenal 16" 5.56 NATO M4 Contour 1:8 Carbine 416R Barrel - Stainless

SKU: B556CM41618-SS
MPN: B556CM41618-SS
Manufactured by Bear Creek Arsenal
4 Reviews



In Stock

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This high quality Bear Creek Arsenal barrel goes through its entire production life in Sanford, North Carolina at Bear Creek's facilities. Drilling, reaming, rifling, and turning are all accomplished on their CNC machines under ISO-9002 Quality Systems, allowing Bear Creek to put every barrel through a 100% inspection and air gauging process, ensuring every individual barrel is flawless before it leaves their facilities.

This 16", 1:8 rifled, M4 contour barrel is machined from 416R stainless teel, heat treated to RC 28-32 hardness, and properly stress relieved. Chambered for 5.56 NATO, BCA expects that it, along with any of their barrels 16" or longer, will hold a 1 MOA group at 100 yards when used with appropriate ammo and shooting techniques.

Gas Port: Carbine length, 0.072"


Barrel CoatingStainless Steel
Barrel ContourM4
Barrel Length16
Barrel LiningStainless Steel
Barrel Material416R Stainless Steel
BrandBear Creek Arsenal
Caliber Gauge5.56 NATO
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthCarbine
Thread Pattern1/2 X 28
Twist Rate1:8
Weight1.5 lbs

Ratings & Reviews

4 reviews

  • 4 stars
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  • 2 stars
  • 0 reviews

Poor accuracy

by -

I purchased item # B556CM41618-SS on order # SO-1171930 on 12-26-17. I finally finished the gun this month with one of your micro red dots on it. It was shooting 8" groups at 50YRDS. I took the red dot off and installed Magpul iron sights. Still no better. I removed the flash hider and shot from a SLED at 50YRDS with 4 different kinds of ammo. It is still not acceptable. Alex from Primary was great in that he contacted B/C on my behalf and got a return issued back to B/C. Jump foreward 2 weeks:
<br>Received the replacement barrel on tracking # 1ZRE88790363307879 invoice # 17879 in 2 pieces. 1 broken in half tube and 1 loose barrel. I have not shot it or even installed it and I don't think I will. I learned my lesson and this will not happen again. Primary Arms 5 stars,B/C product 0 stars

Bad barrel extension

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Barrel extension is not completely finished and will not headspace. Very dangerous and Primary Arms won’t return it. Have to go through Bear Creek which is a pain. Spend the extra $50-100 and get a reliable barrel from a company with a quality customer service department since PA wont do anything.

High Quality Barrel

by -

Professionally machined, perfect fit, gas port must be drilled to correct dimension as everything cycled smoothly. 1/8 twist is perfect. This is a high quality barrel at a very good price!

Best Entry Level Barrels on the Market!!!


Bear Creek barrels can not be beat for the price, Ive used around 50-60 of them now and they are always accurate and well machined. If you're looking for a good econo BUILD barrel look no further.