Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
WMD Guns AR-15/M16/M4 Full Auto Bolt Carrier Group (BCG) - NiB-X Nickel Boron Polished
$164.00 $154.99 Save $9.01
View Product
Compare (0)
Most Helpful Positive Review No friction = No problems
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 on OP. No arguments from me on saving some money
Show
Sort by
Filter by

WMD AR-15 BCG

by James Walker, Verified Owner from TX, United States Written on January 3, 2026
Initial impression is great, it’s very nice looking, and slick as can be. Haven’t fired my 350 Legend with it yet, but I’m excited for it. Had a CMC BCG in it before and although it was very nice, it definitely didn’t cycle as smooth and fast as this one does. Ready to actually try it out now!
Would recommend: Yes
Was it helpful to you? Yes | No

So far so good.

by Ronnie, Verified Owner from NM, United States Written on October 14, 2025
I installed the bcg into my 5 inch 300 blackout. So far it runs great. I used a dab of clp on contact surfaces with no issues. The bcg operation is smooth, clean up of bcg was super easy, just wiped it down.
Would recommend: Yes
Was it helpful to you? Yes | No

BCG for ar 15

by Papawxmas, Verified Owner from IN, United States Written on October 5, 2025
This looks nice and functions good in the gun will see how it holds up compared to my other brands got this item in a timely manner and the price was not bad
Pros:
  • Nice looking and functional
Cons:
  • None
Best Used for:
  • AR 15
Would recommend: No
Was it helpful to you? Yes | No

Get this BCG!

by James Trevino, Verified Owner from TX, United States Written on September 30, 2025
Great BCG. Very nice looking and functions perfectly! It was a Great price too.
Pros:
  • None
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No

Quality Control needs Improvement

by Matt, Verified Owner from ME, United States Written on August 2, 2025
Received this WMD BCG today, the staking job on the gas key does not touch the screws. Quality control must have been sleeping that day. I will never buy their product again.
Pros:
  • I can return it
Cons:
  • Quality Control non existant
Best Used for:
  • paper weight
Would recommend: No
Was it helpful to you? Yes | No

LIKE BUTTER!!!! �

by Alex, Verified Owner from FL, United States Written on July 20, 2025
Install and Perfomance could not be better. Absolutely love this BCG. It looks so cool with the dust cover open and I ran 500 rounds through it yesterday at my bases range. 400 of those rounds were on full auto. Not a jamb or hiccup.

It is exactly what I wanted and more than I expected. Giddy up!!!
Pros:
  • Looks great
  • easy installation
  • Tested and passed Full Auto
Cons:
  • None
Best Used for:
  • AR-15 5.567
Would recommend: Yes
Was it helpful to you? Yes | No

its awesome so far.

by AlexandertheHate, Verified Owner from PA, United States Written on 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? Then I tried the WMD nickel boron BCG and it’s excellent! Better than the toolcraft by a lot (sorry toolcraft). Very smooth operation, with minimal felt recoil. You really will feel a difference with this one, it’s not just bullshit advertising. It’s also full auto capable, so there’s that if you need it. You can see and feel where your extra 40-50 bucks went. It’s not wasted. Build quality appears to be solid, but I can’t comment on the longevity of this product yet, as I’ve only got 200 rounds through it.
Would recommend: Yes
2 of 2 found the following review helpful.
Was it helpful to you? Yes | No

Slippery BCG

by Brian W, Verified Owner from CA, United States Written on June 10, 2025
Great BCG for cost , slippery and works great so far.
Would recommend: Yes
Was it helpful to you? Yes | No

gas key binding

by azBow, Verified Owner from AZ, United States Written on April 22, 2025
BCG will not go in to battery. “Demo” is trash. Save your money
Would recommend: No
0 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Everyone should have!

by Benjamin, Verified Owner from TX, United States Written on March 11, 2025
This was a phenomenal addition to my AR15. Easy to install just drop in and go. Very smooth cycling and no problems or hiccups even through 500 rounds. No staining on the coating or carbon build up and locked back after every mag dump. Cleaning was a breeze just wiped it down and ready to go again. Would definitely recommend to everyone.
Would recommend: Yes
Was it helpful to you? Yes | No
There are no reviews that match your criteria. Would you like to review this product?