Home > AR15 Parts > Bolt Carrier Groups (BCGs) >

WMD Guns Nickel Boron NIB-X Bolt Carrier Group M16 Full Mass - Polished

WMD Guns Full Mass NiB-X M16 Bolt Carrier Group

MSRP $170.00
SALE PRICE: $159.95
Savings: $10.05


Stock Status :(Out of Stock)
Product Code: NIBXBCG

Add RCA Adjustable Gas Key?


WMD Full Mass M16 BCG | NiB-X Coating

The WMD full mass BCG is designed to maximize your AR15 / M4 / M16 weapon experience by providing the best reliability. Every step of the firing process is enhanced when using the WMD bolt carrier group. Starting with the feeding of the round from the magazine, the chambering of the round, the firing and ejection are improved by the coating on the WMD nickel boron bolt carrier group. The NiB-X coating is used by trusted brands Such as Spike's tactical and gives the BCG a clean and smooth performance while allowing longer firing periods without cleaning. This high quality part is capable of acting as an AR15 or M16 full mass BCG and is built to military grade specifications.

Order from our wide array of best-in-class weapon components today and experience many of the great products we have to offer from trusted brands.


  • Bolt - Carpenter 158 heat-treated, shot-peened and magnetic particle inspected. Engineered from government drawings for NiB-X. Milspec gas rings. NiB-X coated (40% more wear-resistant than chrome)
  • Extractor - Manufactured, heat-treated, and hardened per government drawings. NiB-X coated
  • Firing Pin - Manufactured, heat-treated, hardened, chromed and certified per Government drawings
  • Carrier - M4/16 style full mass (heavier) functions in AR15 and M4/16 platforms, 8620 material, heat treated and case hardened. Manufacturing tolerances and surface finishes 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

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 37 Write a review »

  1 of 1 people found the following review helpful:
5 of 5 Great product March 22, 2018
Reviewer: marcus lewis from port lavaca, TX United States  
This BCG is second to none, an extremely good value for the money. I will more than likely use one of these in every one of my AR builds.

Was this review helpful to you?

  0 of 2 people found the following review helpful:
5 of 5 Nice looking! March 28, 2017
Reviewer: Candelario Flores from Lynwood , CA United States  
Bought strictly for cosmetics, to match my polished stainless barrel. Perfect match!  Haven't put rounds thru it yet, but anxious to.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
5 of 5 great all around deal November 24, 2016
Reviewer: L. Sutton from Olympia, WA United States  
I got a great price on this WMD nickel boron BCG. The reviews and craftsmanship on the BCG are already well known. So the price that Right to Bear was offering was hard to pass up and the shipping was fast as well. I am very happy with RTB, their prices and service,

Was this review helpful to you?

  0 of 1 people found the following review helpful:
5 of 5 Good service October 31, 2016
Reviewer: Nathan Newcomb from Bumpass va., VA United States  
Very good service. I was pleased with the product and impressed at how fast it was shipped.

Was this review helpful to you?

  0 of 1 people found the following review helpful:
5 of 5 Looks Good September 17, 2016
Reviewer: Scott Vandermer from Surprise, AZ United States  
Machining and finish look fine, haven't had a chance to shoot it yet.

Was this review helpful to you?

View All Customer Reviews

Browse for more products in the same category as this item:

AR15 Parts > Bolt Carrier Groups (BCGs)
Brands > WMD GUNS
AR15 Parts > Nickel Boron & Nickel Teflon
AR15 Parts > Bolt Carrier Groups (BCGs) > 223 / 5.56 / 300 BLK