AR-15 7.62x39 Bolt Carrier Group NiB-X Nickel Boron Full Auto Profile

WMD Guns

$195.00

More on the way!

AR-15 – 7.62x39 Bolt Carrier Group – NiB-X Nickel Boron – Full Auto Profile

PLEASE DOUBLE CHECK DETAILS AND FITMENT BEFORE PURCHASE.

WMD Guns NiB-X 7.62x39 BCG is built for AR-15 rifles chambered in 7.62x39, using WMD’s slick NiB-X nickel boron coating to reduce friction and make cleanup easier. It’s a complete bolt carrier group (no hammer) with a full-auto style carrier profile and the typical durability upgrades you want in a hard-use carrier group.

Fitment

  • Fits AR-15 uppers chambered in 7.62x39
  • Full-auto style carrier profile (carrier style, not legal capability)

Does NOT fit

  • 5.56/.223 uppers (wrong bolt/caliber system)
  • AR-10/.308 platforms
  • Non-AR platforms or proprietary carrier systems

What it does

  • Provides a complete BCG built specifically for 7.62x39 AR-15 operation
  • NiB-X coating helps reduce fouling adhesion and improves cleanability
  • Uses a heavy-duty extractor setup intended to help reliability with 7.62x39 loads

Why it’s worth it

  • 7.62x39 ARs can be picky—this is one of the parts you don’t cheap out on
  • NiB-X runs slick and wipes cleaner than basic phosphate finishes
  • Quality materials and QC steps (e.g., MPI/shot-peen bolt) for durability

Specs

  • Caliber: 7.62x39
  • Finish: NiB-X nickel boron (bolt and carrier)
  • Carrier: 8620 heat-treated steel (full-auto style)
  • Bolt: 9310 steel, shot peened, MPI-tested
  • Gas key: properly staked; grade 8 fasteners
  • Includes: cam pin, firing pin, retaining pin; extractor system installed

What’s included

  • 1x Complete 7.62x39 AR-15 bolt carrier group (no hammer)

Tools needed

  • None for basic install
  • Recommended: proper lubrication and a function test before hard use

Install notes

  • Drop-in install like a standard AR-15 BCG
  • After install: function-check cycling, extraction, and lockback (where applicable)
  • 7.62x39 reliability is magazine + ammo sensitive—use quality 7.62x39 AR mags

Verify before you buy

  • Confirm your upper is 7.62x39 AR-15 (not 5.56/.223)
  • Confirm you’re not buying for an AR-10/.308 platform

⚠ Trademark & Compatibility Disclaimer
IronKells Armory LLC is not affiliated with, endorsed by, or sponsored by any manufacturer mentioned. All trademarks are the property of their respective owners and are used only to identify compatibility or fitment.

⚠ Install & Compatibility Disclaimer
Installation should be performed by a qualified armorer or gunsmith. Improper installation, modification, or use may affect firearm safety and reliability. Buyer is responsible for verifying compatibility, performing proper function testing, and ensuring safe operation.

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