Bolt Carrier Assembly, 6.5 Grendel, Polished Nickel Boron

Bolt Carrier Assembly, 6.5 Grendel, Polished Nickel Boron
Item Number: TR-BCA-PNIB-65G
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Detailed Description


Manufactured by our finest domestic Mil-Spec contractors these are among the best 6.5 Grendel rifle bolts on the market and the same bolts we use as the basis of our renowned custom rifles!

Our bolt is precision machined from 9310 tool steel, shot-peened for increased strength and includes a tool steel extractor and ejector, appropriate extractor spring, and is MPI (Magnetic Particle Inspected and randomly batch HPT (High Pressure Tested).

The extractor is 4140 gun quality, annealed, cold drawn steel per the Mil-Spec.

The 8620 steel carrier includes a properly machined Mil-Spec gas key that is completely Nickel Boron plated for the ultimate in smooth operation and easy cleanup. It is secured to the carrier via Grade 8 fasteners and properly staked in our shop during the final inspection.

These precisely machined, finished and hardened parts will ensure long term proper gas system functioning and reliability.

All experienced AR shooters know that the best spare parts kit for an AR-15 rifle is a spare complete bolt carrier assembly!

NOTE- The only difference between “semi-auto” and “full-auto” carriers are the carrier weight and external profile.  The “full-auto” carrier is slightly heavier to provide more mass and lower cyclic rate that can benefit carbine length and shorter gas systems, short-barreled/suppressed rifles and machineguns. The “semi-auto” carrier is slightly lighter to provide the least amount of recoil impulse for rifle-length gas systems and its design makes reinstalling the firing pin easier after cleaning.

Both carrier types are considered completely interchangeable and there are no restrictions on the ownership of a “full auto” carrier group in a semi-automatic rifle.

  • Nickel Boron Plated for easy cleanup and less lubrication
  • Mil-spec parts ensure a long service life
  • Machined ejector and extractor per mil specs
  • Full Auto carrier (see note)
  • Drop-in fit for any quality 6.5 Grendel caliber AR rifles.  (Not compatible with 7.62X39)
  • Type “2” Grendel bolt with 1.36” bolt face dimensions work with most 6.5 Grendel barrels


6.5 Grendel

The 6.5 Grendel is a low recoil long-range cartridge designed specifically for the AR-15 platform noted for impressive ballistics using .264 caliber bullets to make accurate shots out to 1,000 yards.  The 6.5 Grendel uses a unique bolt and caliber specific magazine to convert any standard AR. With a wide variety of available factory ammunition, the 6.5 Grendel is a top choice for hunting medium game or extended range target shooting. Wilson Combat barrels are chambered according to SAAMI specifications and use the industry standard "Type-2" Grendel bolt with .136" bolt face counterbore.

Why Nickel Boron is a Superior Choice for AR Bolt Carrier Groups

  • Outperforms hard chrome and nickel-phosphorous (hardness/wear resistance)
  • Withstands high temperatures and is easy to clean
  • High hardness (Rockwell 70 C +)
  • Greater abrasion and wear resistance over time
  • Low coefficient of friction requires less lubrication
  • No hydrogen embrittlement