+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
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.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Reviews & Ratings for WMD Guns AR-15/M16/M4 Full Auto Bolt Carrier Group (BCG) - NiB-X Nickel Boron Polished — 36 reviews

(36 reviews)
WMD Guns AR-15/M16/M4 Full Auto Bolt Carrier Group (BCG) - NiB-X Nickel Boron Polished
WMD Guns AR-15/M16/M4 Full Auto Bolt Carrier Group (BCG) - NiB-X Nickel Boron Polished
$164.00 $159.49 Save $4.51
View Product
Write a Review
Compare (0)
1 item has been added
Add at least two items to compare
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

Great product

by BCG, Verified Owner from FL, United States Written on September 24, 2026
I ordered this for my AR that installed a FRT trigger, flawless! This is a great upgrade if you want higher performance from your BCG
Would recommend: Yes
Was it helpful to you? Yes | No
Share

Great bolt

by Rob, Verified Owner from GA, United States Written on August 8, 2026
Great bolt I recommend it, I own 2 of these & I have back up parts. I recommend it, good buy for the money.
Best Used for:
  • 5.56 & 300 blk
Would recommend: Yes
Was it helpful to you? Yes | No
Share

Bolt Carrier

by Super carrier, Verified Owner from KY, United States Written on July 7, 2026
Great product works really well in my A.R.15, super reliable. Standard assembly easy pop open both upper and lower receivers place in bolt. Put back together and you're ready to go. Highly recommend this to anybody who is looking for an upgraded bolt carrier.
Would recommend: Yes
Was it helpful to you? Yes | No
Share

one shot charlie

by Billy, Verified Owner from TX, United States Written on May 13, 2026
very slick feel, accurate description, fast shipping was worth the wait.
Pros:
  • very well made and a good price
Cons:
  • non
Best Used for:
  • Precision rifle
Would recommend: Yes
Was it helpful to you? Yes | No
Share

Bolt carrier group

by Bobby, Verified Owner from SC, United States Written on May 6, 2026
Works great nice love them I’ll buy more soon ejects rounds perfect
Would recommend: Yes
Was it helpful to you? Yes | No
Share

WMD Bolt Carrier Group

by Big Ray, Verified Owner from CA, United States Written on March 31, 2026
Using in in my 350 Legend. I have around 200 rounds cycled through it and so far so good
Would recommend: Yes
Was it helpful to you? Yes | No
Share

Great bolt

by Rob, Verified Owner from GA, United States Written on March 3, 2026
Great bolt, it has a super slick coating better then toolcraft. Great gas key steaking the screws are special. Hard steel doesn't damage easily. Easy to clean carbon off after a lot of rounds spent.
Pros:
  • easy to clean and maintain
Cons:
  • none yet
Best Used for:
  • 5.56 & 300 blk
Would recommend: Yes
Was it helpful to you? Yes | No
Share

Smooth and easy!

by Chad, Verified Owner from IA, United States Written on February 19, 2026
If you need something that can handle speed? This is it! When it's time to clean... simply wipe it down. No more wasting time cleaning!!!
Pros:
  • Works & fits great
Cons:
  • None
Best Used for:
  • Speed
Would recommend: Yes
Was it helpful to you? Yes | No
Share

What I like most!

by SureShotMike, Verified Owner from VA, United States Written on February 10, 2026
What I like most is that it's super easy to clean because I DO NOT clean my firearms after every range day!! They should be able to run dirty and they do! That's what makes them good to me. Anyway, I love this BCG. So sleek, even with the logo stamped/lasered into it, haha. I going to shoot the bajeezus out of this thing!! Love love love it and highly recommend!!
Pros:
  • Easy to clean
  • sleek
  • retains oil
Cons:
  • logo location
Best Used for:
  • Armalite Rifles
Would recommend: Yes
Was it helpful to you? Yes | No
Share

Great product

by Rich, from OK, United States Written on January 30, 2026
Great product and quality for the price, reliable and easy to install; haven’t had any issues and will definitely be buying more soon for my other firearms
Would recommend: Yes
Was it helpful to you? Yes | No
Share
There are no reviews that match your criteria. Would you like to review this product?
Last updated 2025-11-12 UTC.