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WMD NiB-X AR-15/M16 Bolt Carrier Group - No Hammer

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Product Description

The WMD Bolt Carrier Group is machined from high grade 8620 steel to M16 rated specs before being coated in WMD’s proprietary NiB-X nickel boron coating. The NiB-x coating on the BCG reduces corrosion and abrasion. The WMD coating also provides a slick finish for easy cleanup. We also carry the same BCG with hammer included.


  • Bolt – Carpenter 158 case hardened, shot peened and magnetic particle inspected. Manufactured to Government drawings. Mil Spec gas rings. NiB-X coated (40% more wear resistant than Chrome).
  • Extractor – Manufactured, heat treated, hardened, per Government drawings. Black extractor buffer and heavy duty spring. NiB-X coated.
  • Firing Pin – Manufactured, heat treated, hardened, Chromed and certified per Government drawings.
  • Carrier – M16 style carrier (heavy weight), 8620 material, heat treated and case hardened. Manufacturing tolerances on inside diameters tightly controlled. NiB-X coated for durability and ease of cleaning.
  • Gas Key – Hardened to USGI Specifications and attached using grade 8 hardened fasteners. Permatex No. 3D Aviation Form a gasket Type III Sealing Compound per MIL-S-45180 used on assembly. NiB-X coated. Staked per military specifications.
  • Cam pin – Manufactured, heat treated, hardened and certified per Government drawings. NiB-X Coated



Write Review

  1. One of the nicest Bolt carriers I have seen! 5 Star Review

    Posted by on Aug 14th 2017

    I bought four of these BC G's. One complete and three that I finished my self using all WMD NIB coated parts..and titanium firing pins Some of the nicest and smoothest bolts I have ever seen. Perfect workmanship.I have built 17 Ar's of different configurations with some of the best brand name bolts. These exceed most of them by far. These bolts will be used in everything I build in the future.. You can't go wrong by putting one of these in your next build or upgrading your present weapon.

  2. SUPER SLICK 5 Star Review

    Posted by on Jun 13th 2017

    Best BCG I ever bought, unfortunately now I have to replace my others

Shipping & Returns

Return Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the United States. Note that there are restrictions on some products, and some products cannot be shipped to certain areas. It is up to you as the consumer to make sure you comply with ALL LAWS in your area as it is difficult for us keep up with the ever changing restrictions.

When you place an order, we will estimate shipping and delivery dates for you based on the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

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