QUESTIONS? CALL US AT 715-790-1322
QUESTIONS? CALL US AT 715-790-1322

AR-15 UPPERS

.22 ARC Upper Receiver

OPTICS

Black rifle scope with adjustment knobs and green-tinted objective lens.
Vortex Optics
Two black thermal rifle scopes labeled HARVESTER and SNIPER LRF on a transparent background.
Predator Thermal Optics

TOP PICKS

Two rifle upper receivers with scopes shown side by side on a white background.
Uppers + Optics Bundles
17" v.3 Grendel Hunter Handguard - Black
Handguards
Bolt Carrier Groups
Low profile .750 click adjustable gas block with black nitride finish for AR-15 tuning.
Gas Blocks
5, 10, 15 and 20 round magazines for the 22 arc, 6mm arc and 6.5 Grendel
Magazines
Stalker AR-15 Lower Build Kit 1
Lower Build Kits
Two rifle barrels one black and one stainless steel shown side by side on a white background.
Barrels

UPPER PARTS

LOWER PARTS

GRENDEL HUNTER MISC

AR-15 UPPERS

.22 ARC Upper Receiver

OPTICS

Black rifle scope with adjustment knobs and green-tinted objective lens.
Vortex Optics
Two black thermal rifle scopes labeled HARVESTER and SNIPER LRF on a transparent background.
Predator Thermal Optics

TOP PICKS

Two rifle upper receivers with scopes shown side by side on a white background.
Uppers + Optics Bundles
17" v.3 Grendel Hunter Handguard - Black
Handguards
Bolt Carrier Groups
Low profile .750 click adjustable gas block with black nitride finish for AR-15 tuning.
Gas Blocks
5, 10, 15 and 20 round magazines for the 22 arc, 6mm arc and 6.5 Grendel
Magazines
Stalker AR-15 Lower Build Kit 1
Lower Build Kits
Two rifle barrels one black and one stainless steel shown side by side on a white background.
Barrels

UPPER PARTS

LOWER PARTS

GRENDEL HUNTER MISC

AR-15 UPPERS

.22 ARC Upper Receiver

OPTICS

Black rifle scope with adjustment knobs and green-tinted objective lens.
Vortex Optics
Two black thermal rifle scopes labeled HARVESTER and SNIPER LRF on a transparent background.
Predator Thermal Optics

TOP PICKS

Two rifle upper receivers with scopes shown side by side on a white background.
Uppers + Optics Bundles
17" v.3 Grendel Hunter Handguard - Black
Handguards
5, 10, 15 and 20 round magazines for the 22 arc, 6mm arc and 6.5 Grendel
Magazines
Bolt Carrier Groups
Low profile .750 click adjustable gas block with black nitride finish for AR-15 tuning.
Gas Blocks
Stalker AR-15 Lower Build Kit 1
Lower Build Kits
Two rifle barrels one black and one stainless steel shown side by side on a white background.
Barrels

UPPER PARTS

LOWER PARTS

GRENDEL HUNTER MISC

QUESTIONS? CALL US AT 715.790.1322

Grendel Hunter 6.5 Grendel / 6mm ARC / .22 ARC Bolt Carrier Group

Price range: $129.99 through $199.99

BCG Technical Specifications:

  • Carrier: M16 Auto Profile (8620 Steel) for smooth cycling and increased mass.

  • Gas Key: 4130 Steel with properly staked Grade 8 fasteners.

  • Bolt: 6.5 Grendel (Type 2) / 6mm ARC / .22 ARC (9310 Steel)

  • Small Parts: 4140 Steel Cam Pin and Hard Chrome Firing Pin.

The Grendel Hunter BCG: Precision-Tuned Reliability

  • Optimized Extractor Tension: Excessive tension is a leading cause of malfunctions and extractor failure. We are meticulous about our extractor tension being at the “sweet spot”—ensuring reliable cycling without putting unnecessary stress on the steel.

  • Radiused Extractor Geometry: We avoid the “sharp fangs” found on most extractors. By having smooth corners on the extractor claw, we prevent the steel from digging into the brass case rim, ensuring the ejector can “kick” the brass out at the exact right microsecond for a clean ejection cycle.

  • Built to Last: Our bolts are machined from 9310 Steel, shot-peened for fatigue resistance, and Magnetic Particle Inspected (MPI).

Professional Grade Finishes

We offer four distinct finishes, each offering a significant upgrade over the old Mil-Spec phosphate in terms of lubricity, hardness, and ease of cleaning.

BCG Finish Specifications

Black Nitride

  • Surface Hardness: ~740 HV (Vickers)

  • The Process: A salt-bath thermo-chemical treatment that hardens the steel.

  • The Benefit: Far more durable and smoother than original Mil-Spec magnesium phosphate with excellent corrosion resistance.

Nickel Boron (NiB)

  • Surface Hardness: ~1800 HV (Vickers)

  • The Process: UCT EXO® (High Boron content).

  • The Benefit: An extremely hard, durable finish with a very low friction coefficient. It’s smooth and wipes clean easily.

DLC (Diamond-Like Carbon)

  • Surface Hardness: ~2300 HV (Vickers)

  • The Process: Next-level Plasma Enhanced Chemical Vapor Deposition (PECVD)

  • The Benefit: High hardness, Excellent abrasive wear resistance, Low thermal conductivity, Ultra-Low friction level.

P51+ High Polish Black

  • Surface Hardness: ~2300 HV (Vickers)
  • The Benefit: The same attributes of our DLC, but it receives extra polishing cycles to give it an EXTREMELY smooth and deep, black finish. 
Josh M
Absolutely love the finish...top notch. I would definitely buy again without hesitation.
Mark
This is an awesome bolt carrier group. Super smooth functionality and super easy to clean. THE BEST!!!!!
Bobby
Excellent delivery time, product as advertised! Great upgrade to my build. Definitely has resolved my issues in running a suppressed gun. Will recommend to others!

Bundle & SAVE!

Grendel Hunter 6.5 Grendel / 6mm ARC / .22 ARC Bolt Carrier Group - DLC (Diamond Like Carbon) + Low profile .750 click adjustable gas block with black nitride finish for AR-15 tuning.
BUNDLE PRICE!: Original price was: $229.98.Current price is: $209.99. Save $19.99

If you are only in need of a bolt, you can find those available here

Additional information

Weight .8 lbs
Dimensions 7.9 × 1.5 × 1.9 in
Finishes

Black Nitride – The nitriding process involves a salt (chemical) bath which provides corrosion resistance and hardens the surface of the steel (~740 HV). This thermo chemical treatment gives you a far more durable and smoother finish than the original Mil-Spec magnesium phosphate.
Nickel Boron – The UCT EXO® NiB has a higher boron content than any other commercially available nickel boron which provides this BCG with an extremely hard (~1800 HV), durable finish. It is very smooth with a low friction coefficient.
Diamond Like Carbon – This DLC hybrid is a next level coating that is even harder (~2300 HV) than nitride or nickel boron. It is smooth, easy to clean and has a deep, dark gray color.
P51+ High Polish Black – This has all the same attributes of our DLC hybrid, but it receives extra polishing cycles to give it an EXTREMELY smooth and deep, black finish. It is even harder (~2300 HV) than nitride or nickel boron.
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31 reviews for Grendel Hunter 6.5 Grendel / 6mm ARC / .22 ARC Bolt Carrier Group

  1. Forrest –

    First of all fast free shipping love that. The BGG came in quickly not damaged and I received email notification of all pertinent information such as shipping number date etc.
    The BCG works flawlessly in my rifle. Extraction ejection was good. Brass was not chewed up along the rim. I do have an adjustable gas block from Grendel Hunter as well. Also the BCG looks dang good with my handguard and upper receiver. Recommend this item for sure.

  2. Josh Marshall (verified owner) –

    Absolutely love the finish. Fit and finish is top notch. I would definitely buy again without hesitation.

  3. Shane Boyd (verified owner) –

    Great company. Fast shipping and works flawlessly

  4. Adrian Campbell (verified owner) –

    I love this bolt. It looks great and is so smooth. It cleaned easily and I didn’t even need lube, just firing a few dozen rounds on the first outing. When I do another grendel build, this will be the bolt I buy!

  5. Kelly (verified owner) –

    1st off, they had the bcg when nobody else had it. Next it shipped free and I had it in 3 days. Finally! It works great

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