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22" 6mm Predator(Grendel) 8 twist 3R & Titan bolt
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Part of our Predator line of barrels(markerd 6mm Predator), this cartridge is based on the PPC or Grendel brass, we recommend Norma Grendel brass. This is the same as the  "6mmAR" or "243LBC". Exact same chamber and freebore as the 243LBC. The 243LBC freebore was located at a good length, I left it .  Whatever it is called it is capable of pushing 95gr bullets with a BC of .456 to 2800fps out of a 20" barrel and 105s to apx 2775fps making it one of if not the flattest shooting long range cartridges to fit in an AR15. Exterior ballistics beat the Grendel. It may also be the most versatile cartridge we have ever produced. It is capable of shooting super light bullets at small varmints, 75gr bullets at yotes, 95-108gr long range target bullets and 80-90gr hunting bullets at deer and hogs.   Hornady custom dies are available as an option below.  Grendel bushing dies with a .268 bushing  and a 6mm expander ball may also be used to load.  Norma & Hornady brass tends to work better. Try 27.5-28gr  8208 with a a 95smk set to 2.29 OAL. Customer photo of group shown. These 22" 3R barrels are as fast as many of the old 6 groove style 24" barrels. 

This barrel and bolt combo is being produced specifically to fix all off the issues with the Grendel sized cases. I have done everything I can possibly do to make this combo of cartridge, barrel and bolt as strong as possible. They are the strongest bolts made for .442" diameter cartridges. Regardless of what you read on the internet bolts with a .136 recess are NOT stronger than bolts with a .124" recess and the extractors are the same.  The .124 recess bolts also position the brass .012" further in the chamber which keeps the thin case wall away from the unsupported chamfer area at the breech so you can run higher pressures without getting as much of a Grendel belted magnum look and possibly rupturing cases. The bolts will handle 58000 psi if the brass will, those two things will get you an extra 100fps over typical Grendel bolts and cases running 52,000psi. In addition these sets are held to very tight tolerances. Headspace is set to minimum to help prevent case stretch improving case life further.  If you play with the chambering/carrier by hand you will likely hear and feel the lugs clicking when new. They will smooth out as used but the design is intended to make the barrel and bolt as strong as possible. This combination of parts and specs is how the Grendel should have been made from day 1.

  • Chamber: 6mm Predator
  • Bolt: Titan .124 recess- Black Oxide coated
  • Profile:  SPR-.850/.750/.718
  • Fluted: No
  • Barrel Length: 22"
  • Twist Rate: 1:8- Hybrid 3R rifling
  • Gas System: RIFLE 
  • Diameter at Gas Port: .750"
  • Muzle Thread Pitch: 5/8x24
  • Material: 4150 Chrome Moly Vanadium Steel
  • Finish: Melonite
  • Process: Button Rifled
  • Barrel Lining: Melonite
  • Barrel Extension: M4-Black Oxide coated
  • Assembly: Stripped
  • Weight: 2lb 12oz
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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, 224 Valkyrie, 270-08, 30 Herrett, TAC 6,

    224 Predator, 6mm Predator,  224 Grendel, 6mm ARC

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