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18" 6.5 Grendel -4150 Melonite Hi-perf 5R rifling
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If your primary use is shooting targets with some hunting the Grendel is a good choice. There are more 6.5 target type bullets than usable hunting bullets. Hornady 123gr factory ammo is easily 1 MOA.

Criterion  profile barrels are ported to run factory ammo with a standard CAR buffer and spring. These barrels have a hi performance 5R rifling instead of the old school 4 or 6 groove enfield rifling. They usually produce 60-90fps more than 4 or 6 groove barrels with the same ammo.  Melonite treated barrels(60C) are twice as hard as stainless (32C)and should last twice as long.

These barrels need to be used with a .136" deep recess Grendel bolt.  Warning -DO NOT purchase a black Nitride, Nitride or Melonite treated bolts.  Nitride treatment of a bolt after it has been case hardened by gas carburizing makes the bolt softer. The lugs will compress and headpace will increase over time. A5 and Grayfox the first sign as your bolts compress will be flattened primers with loads that once did not flatten the primers. Check your headspace.

No coupons or discounts with this item.  Shipping flat rate $20.    Barrel is Black

  • Chamber: 6.5 Grendel (SAAMI)
  • Bolt: uses .135 -.136 recess Any SAAMI Grendel bolt
  • Profile:  Criterion Tapers-.850- .750/.750GB/.718
  • Fluted: No
  • Barrel Length: 18"
  • Twist Rate: 1:8- Hybrid 5R rifling
  • Gas System: mid  Length
  • Diameter at Gas Port: .750"
  • Muzle Thread Pitch: 5/8x24
  • Material: 4150 CMV
  • Finish: Melonite
  • Process: Button Rifled
  • Barrel Lining: Melonite
  • Barrel Extension: M4
  • Assembly: Stripped
  • Weight: 2lb -3oz
gas tube:
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    (ARP) AR15 Performance LLC

    Key West, FL 33040

    Hi performance 5.56 & 6.8 SPC barrels and parts since 2007

    The best way to contact is by email

    Phone: 801-750-4216  8am-5pm eastern time  M- Fri only
    Sorry we do not export anything and do not have a storefront. Everything must be purchased online.

    6.8 SPC II, 5.56, 223 wylde, 6.5 Grendel, 224 Valkyrie, 270-08, 30 Herrett, TAC 6, 224 Predator, 6mm Predator, 277 WLV,  224 Grendel, 6mm Grendel, 6.5 Creedmoor, 5.56 x 42,

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