Criterion Barrels 6.5 Grendel AR-15 Barrel - Hybrid Profile - Rifle Length - Stainless Steel - 18"

Manufactured by Criterion Barrels Inc.
SKU: 65G18S-HY12
MPN: 65G18S-HY12
Manufactured by Criterion Barrels Inc.
2 Reviews

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Note: This barrel is chambered for the 6.5 Grendel Type II bolts only. Type I will not work.

6.5 Grendel is known for being an extremely accurate and capable round at longer distances than the 5.56 round and can be fired from the same AR-15 platform. Criterion Barrels now offers a custom made 6.5 Grendel barrel with all the accuracy enhancing qualities you expect. These match grade barrels are machined from a block of stainless steel and feature their popular hybrid profile. This profile combines the accuracy benefits of a heavy barrel profile but tapers towards the muzzle to help reduce weight, making it much more maneuverable and easy to carry. These barrels feature a 1:8 button rifled twist rate and are hand-lapped to ensure every land and groove is smooth and consistent. This barrel is great for building a precision rifle that performs excellent at distance while being compatible with most AR-15 components.

  • 18” barrel with 6.5 Grendel Type II chamber
  • Hybrid barrel contour
  • 1:8 button rifled twist
  • Hand lapped
  • Rifle length gas system with .750” diameter
  • Dimpled beneath the gas port
  • Weight: 2.50 lbs

The rifle length gas system on this barrel has a .750” gas block diameter and features a dimple beneath the gas port for installing a set screw style gas block. This simple addition helps to lock the gas block down and ensures it won’t move while shooting. This Criterion Hybrid barrel is built to withstand years of heavy use while providing exceptional accuracy.

Criterion Barrels are known for building high quality, precision AR-15 and AR-10 barrels as well as barrels for older firearms like the M1 Garand, M14, and Lee Enfield. Their barrels are used by the US Army Marksmanship Unit Action Shooting Team and the US Marine Corps Combat Shooting Team and are proven to win matches time and time again.
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Barrel Coating
Barrel ContourHybrid
Barrel Length18
Barrel LiningStainless Steel
Barrel MaterialStainless Steel
BrandCriterion Barrels Inc.
Caliber Gauge6.5 Grendel Type 2
Feed RampsM4
Gas Seat Diameter.750
Gas System LengthRifle
Thread Pattern5/8 X 24
Twist Rate1:8
Weight2.50 lbs.
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

2 reviews

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Worth the money.

by -

I bought this barrel after being disappointed with 2 "cheap" Bear Creek barrels. This barrel is an extremely accurate item that produces half inch groupings at 100 yards. It does not disappoint!

Money well spent

by -

If you are looking for superb accuracy you cannot go wrong for the price. Consistent sub-MOA groups are the norm for mine. Hybrid profile is optimal for both target shooting and for hunting or plinking.