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Questions & Answers
Is this 223./556.? Expert Answer

Yes, the WMD Guns AR-15/M16/M4 Full Auto Bolt Carrier Group is a .223/5.56 BCG.

by Ethan, Gear Expert, December 8, 2025
I do not see if this was individually MPI and HPT tested or not? Can you answer that? Thank you

Bolt: Case-hardened 9310 steel with Mil-Spec NiB-X® extractor, gas rings and ejector, plus specialized O-ring buffer. Shot peened and magnetic particle inspected for quality assurance

by Matty87, Verified Owner, November 13, 2025
Customer Reviews
Helpful Positive Review
Great bolt carrier group and service by Gil, Verified Owner, April 23, 2024
I ordered this BCG over the weekend and had it in my greedy paws early the next week. Characteristically great service from OpticPlanet. Saved some money by buying here, and thrilled to have this new bolt carrier group. I was amazed at how slick this...
Read More...
2/2 found this helpful
Helpful Positive Review
Super quality by JeffS, Verified Owner, March 29, 2024
A very well made BCG. The finish is very nice. You can feel the quality
1/1 found this helpful
Helpful Positive Review
well made and looks very good by Concours14, Verified Owner, November 10, 2024
I can’t completely review this bolt carrier group because I haven’t shot the gun that it’s in. Just by observation, the BCG is very nicely made and looks like a very high quality product. It headspace’s perfectly. It’s very slick, moving in the up...
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1/1 found this helpful
Helpful Positive Review
its awesome so far. by AlexandertheHate, Verified Owner, July 20, 2025
Honestly, I ordered it and immediately wondered if I spent 50 dollars too much? other nickel boron BCG’s can be had a bit cheaper. I have a “tool craft nickel boron BCG” and I do like it, but the only difference I noticed was the ease of cleaning? Th...
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2/2 found this helpful
Helpful Positive Review
Great BCG! by Charles, Verified Owner, August 7, 2024
Great lubricity which causes less friction while cycling rounds and makes cleaning your BCG a breeze! I own a few of these and would highly recommend it to other AR15 platform shooters.
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Helpful Positive Review
No friction = No problems by Nicholas Knight, Verified Owner, September 4, 2023
Nothing bad to say here, Worked like a dream even after 1,000 rounds! No issues with the staking on the key, no discoloration from lack of lubricity, just install and go! Almost bought another companies for $100 more until I saw this one for cheaper ...
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Read All 29 Reviews
Color:
Nickel, Silver
Finish:
NiB-X
Caliber:
5.56x45mm NATO
Gun Make:
AR Platform
Gun Model:
AR-15, M4, M16
Condition:
New

Code: 1UX-BCG-BNMK-1-NIBXBCG0001

MPN: 1-NIBXBCG0001

UPC: 855899003010

List: $164.00Save $7.01
$156.99

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Product Info for WMD Guns AR-15/M16/M4 Full Auto Bolt Carrier Group (BCG) - NiB-X Nickel Boron Polished

NiB-X M16/AR-15 Full Auto Bolt Carrier Group BCG - POLISHED All WMD BCG components are manufactured by Defense Industrial Base suppliers to WMD's exacting specifications to provide the best BCG available. Specifically engineered for NiB-X nickel boron coating to provide long life, high reliability and easy cleaning and maintenance. The BCG components are coated and polished to reduce fouling adherence. Coating is guaranteed for life against chipping, spalling or flaking. Over 30K rounds in Government protocol endurance testing did not wear the coating off. Especially beneficial in short barrel setups and suppressed platforms.image

Specifications for WMD Guns AR-15/M16/M4 Full Auto Bolt Carrier Group (BCG) - NiB-X Nickel Boron Polished:

Manufacturer: WMD Guns
Color: Nickel, Silver
Finish: NiB-X
Fabric/Material: 9310 Steel, 8620 Alloy Steel
Carrier Material: 8620 Steel
Bolt Material: 9310 Steel
Caliber: 5.56x45mm NATO
Gun Make: AR Platform
Gun Model: M16, M4, AR-15
Condition: New

Features of WMD Guns AR-15/M16/M4 Full Auto Bolt Carrier Group BCG - NiB-X Nickel Boron Polished:

  • Bolt- Case hardened 9310, shot peened, magnetic particle inspected, with high-performance extractor, ejector springs, gas rings and special O-ring buffer.
  • 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 - Faceted M4/16 style full auto (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.

Package Contents:

  • WMD Guns AR-15/M16/M4 Full Auto Bolt Carrier Group - NiB-X Nickel Boron Polished

WMD Guns AR-15/M16/M4 Full Auto Bolt Carrier Group (BCG) - NiB-X Nickel Boron Polished Orderable Models

List of Orderable Models

  • WMD Guns AR-15/M16/M4 Bolt Carrier Group BCG, 5.56, NiB-X, Anodized, 1-NIBXBCG0001 , MPN: 1-NIBXBCG0001 , UPC: 855899003010 , Code: 1UX-BCG-BNMK-1-NIBXBCG0001

WMD Guns AR-15/M16/M4 Full Auto Bolt Carrier Group (BCG) - NiB-X Nickel Boron Polished Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, WMD Guns AR-15/M16/M4 Bolt Carrier Group BCG, 5.56, NiB-X, Anodized, 1-NIBXBCG0001 , MPN: 1-NIBXBCG0001-DEMO , Code: 1UX-BCG-BNMK-1-NIBXBCG0001-DEMO
  • USED WMD Guns AR-15/M16/M4 Bolt Carrier Group BCG, 5.56, NiB-X, Anodized, 1-NIBXBCG0001, EDEMO2, Condition Parts Only/Salvage, Wrong Product , MPN: 1-NIBXBCG0001-EDEMO2 , Code: 1UX-BCG-BNMK-1-NIBXBCG0001-EDEMO-WP-F
  • USED WMD Guns AR-15/M16/M4 Bolt Carrier Group BCG, 5.56, NiB-X, Anodized, 1-NIBXBCG0001, EDEMO4, Condition Fair, Scratches , MPN: 1-NIBXBCG0001-EDEMO4 , Code: 1UX-BCG-BNMK-1-NIBXBCG0001-EDEMO-SC-D
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