Bear Creek Arsenal 18" 6.5 Grendel Type II 1:8 Mid-Length Heavy Barrel - Straight Flutes - Black Nitride

SKU: B6.5MHB1818-MF
MPN: B6.5MHB1818(MF)
Manufactured by Bear Creek Arsenal
2 Reviews


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Bear Creek Arsenal products complete their entire production cycle at their Sanford, North Carolina facilities. Drilling, reaming, rifling, and turning are all performed on CNC machines under ISO-9002 Quality Systems, allowing Bear Creek to precisely control each step of manufacturing. Careful inspection ensures each barrel meets their stringent standards before shipping.

This black nitrided heavy barrel, chambered in 6.5 Grendel Type II with a 1:8 twist rate, includes straight flutes.

Bear Creek Arsenal guarantees 1 MOA grouping at 100 yards when appropriate shooting techniques and high-quality ammunition are used.

NOTE: Bear Creek Arsenal does not recommend using steel cased ammo in their assemblies or rifles.

Safety Note: Choosing 6.5 Grendel comes with an added complication. There are “Type I” and “Type II” bolt/barrel specifications out there, and you CAN NOT mix and match parts for each of them without risk of damage and/or injury. Type II is by far the most popular configuration, but pay attention to what you are buying! A Type I bolt won’t chamber rounds in a Type II barrel at all. Even worse, a Type II bolt mated to a Type I barrel will create excessive headspace and result in a rifle that is dangerous to fire.

  • 4150 chrome moly vanadium HBAR barrel with black nitride finish 
  • Chambered in 6.5 Grendel Type II with a 1:8 twist rate
  • 5/8x24 thread pitch
  • M4 feed ramps
  • Straight flutes
  • Gas seat diameter: .750”
  • Gas port diameter: 0.070”
  • Weight: 2 lbs


Barrel CoatingSalt Bath Nitride
Barrel ContourHBAR
Barrel Length18
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandBear Creek Arsenal
Caliber Gauge6.5 Grendel Type 2
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthMid-Length
Thread Pattern5/8 X 24
Twist Rate1:8
Weight2 lbs

Ratings & Reviews

2 reviews

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Surprisingly great results


Playing with grendel for a year now, i have a few uppers but built one with this and an alexaner arms hard use bolt. It takes about 50 rounds to lap it out. I put a polish on the ramp edhe also. It shoots touching holes in a straight vertical .75 inch 5 shot group. I was worried with first box of ammo at 3 inchs. Setteled in real well.All hornady and federal fusion so far. fusion and sst are within .25 of each other at 100. Fusion sits right on top of sst. Super pleased!

Awesome barrel with 1/2" groups @ 100 yds. Why spend more!!


Used this barrel on a Aero Precision build. getting 1/2" groups at 100 yds shooting Fusion ammo. There are many other barrels to choose from, but this one performs very well for the money!! Flutes and finish were very nice. Plan to use this as a deer hunting round!!