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BROWNELLSM16 Bolt Carrier Group 5.56x45mm Nitride MP

49 Reviews
|
Summary
M16 Bolt Carrier Group 5.56x45mm Nitride MP
Brownells #
078102001
MFR #
M16 BCG 5.56X45MM NITRIDE MP
UPC
050806002371
$98.99

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Specifications
Cartridge:
5.56x45 NATO
Finish:
Black Nitride
Carrier Type:
M16
Color:
Black
Make Model Fit:
AR-15.Universal
Model Number:
BCG Only
Restriction
Restricted Part:
Yes
Can we ship this to you? (US only)
Description

Made In The U.S.A.

Products marked with the Stars and Stripes are proudly made in the U.S.A.

Many customers have asked us to show which products are made in America, and we’ve begun working with our vendors to identify them. This information, however, is not available for all items nor does it imply that foreign merchandise is of lesser quality. We will continue to gather this information to assist our customers in making informed buying decisions, and will keep our website current with the latest information.

Guaranteed. Forever.®

We make purchasing and returning products as simple as possible. If you buy a product from Brownells and decide you don’t need it, don’t want it, or just don’t like it, we’ll take it back any time… with a few exceptions

Exceptions include: 

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All other products are Guaranteed. Forever.® you can easily identify these products by the Guaranteed. Forever.® Icon.

Guaranteed. Forever.

Guaranteed. Forever.® return policy applies to the product’s original owner along with proof of purchase. Any items returned within 45 days of shipment are entitled to a refund. Any items returned after 45 days of shipment will be issued store credit in the form of a Brownells Gift Card. If a Brownells/Sinclair product was purchased through another retailer as a new product we will require proof of purchase to replace or refund.  (Refund will be issued as store credit in the form of a Brownells gift card.)  

The Brownells Bolt Carrier Group is made by a well-established firearms industry manufacturer, made to our specifications. All components of the BCG are made in-house, under one roof, not outsourced to the lowest bidder. Even the firing pin and gas key, commonly outsourced components, are machined by our manufacturer. These Bolt Carrier Groups are rigorously inspected at the factory, for hardness requirements, fitment, cam path geometry, magnetic particle inspection of the bolt and more. Materials for these Bolt Carrier Groups are certified in batches and the dimensions are true to the most current military specifications. Proudly Made in the USA.

  • Bolt is made from 9310 hardened steel, shot peened and magnetic particle inspected
  • Carrier is machined from 8620 hardened steel
  • Extractor is machined from 4340 steel and includes mil-spec extractor spring and black o-ring
  • Gas Key is machined from 4130 steel and attached with Grade 8 screws, that are properly staked into a milled “valley” to ensure proper positioning
  • Cam Pin is machined from hardened 4340 steel
  • Firing Pin is made from 8740 steel, center-less ground and hard chrome coated
  • Magnetic-particle inspected Bolt
  • Extractor includes spring and rubber insert
  • Includes torqued and staked gas key
  • Functions with any cartridge based on the 5.56 NATO cartridge case

The Brownells M16 5.56 Complete Bolt Carrier Group is designed to work easily and reliably in any AR-15 or M16 rifle chambered in 5.56x45mm, 300 AAC Blackout or .223 Remington. The Brownells M16 5.56 Complete Bolt Carrier Group comes with a bolt, bolt carrier, gas key, firing pin, cam pin and a firing pin retaining pin.

Restricted Part
Please check with your state regulations for ownership of Restricted Parts. May require documentation.

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M16 5.56 BOLT CARRIER GROUP NITRIDE MP Reviews
Rating Snapshot
Select a row below to filter reviews
82%
(40)
6%
(3)
6%
(3)
2%
(1)
4%
(2)
Overall Rating
4.6
49 Reviews
Review Summary
The M16 5.56 BOLT CARRIER GROUP NITRIDE MP by Brownells garners attention for its excellent build quality, performance, and attractive price point. While the nitride finish is praised for easy cleaning and smooth operation, some reviewers noted issues with gas key staking and minor machining marks. Generally, users report high satisfaction with functionality and value.
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REVIEWS
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078000347
078000375
078000376
078000407
078102001
082024004
100002946
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100024307
100024603
100028045
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100034713
100034715
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100054359
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430101565
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430101568
430103071
430103072
430106992
430106993
430106994
915000021
953000017
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Accurate
Easy To Adjust
Lightweight
Quality Construction
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Heavy
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Poor Construction
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Hunting
Self Defense
Tactical
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Gun Collector
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49 Reviews
September 05, 2019
Great quality
I have 2 of these now and they have been fantastic.One in my Aero 14.5 upper and another in an FN M16A4 upper.Best bang for your buck IMO
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Verified Purchase
September 16, 2023
M16 5.56 BOLT CARRIER GROUP NITRIDE MP
WORKS GREAT!!!!FAST service!!!!
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Verified Purchase
August 31, 2023
Really nice!
I bought a customized upper that included a BCG.It was claimed to be Mil spec.The only thing Mil about it were the mill marks on the carrier.This came today and the quality is really nice and the price is even better.The added weight of being a M16 carrier had no effect of cycling.Highly satisfied.
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Verified Purchase
August 21, 2024
Complete MM-16 bolt carrier
Haven’t installed in my AR-15.Yet Looks great cant wait to install it with the new trigger i bought from you.
Was This Review Helpful?
Verified Purchase
February 04, 2025
Great product!
Looks and feels great.Haven't got to shoot with it yet, but will soon.Bought it for my AR I just installed a fostok trigger in.Looking forward to range day!
Was This Review Helpful?
Customer Questions
Customer Questions
Show all
078000347
078000375
078000376
078000407
078102001
082024004
100002946
100003135
100011220
100015262
100018687
100019249
100020758
100024307
100024603
100028045
100028047
100034713
100034715
100036679
100038748
100038750
100041810
100041811
100041834
100041835
100041836
100042361
100042434
100042436
100042969
100054336
100054337
100054359
100054360
430101565
430101567
430101568
430103071
430103072
430106992
430106993
430106994
915000021
953000017
Newest
Oldest
Most Votes
Least Votes
49 Questions
M
M
Mark Sweet
March 06, 2025
What is the difference between BCGs Brownells #078102001, M16 BCG 5.56X45MM NITRIDE MP and Brownells #078000563, AR-15 Bolt Carrier Group 5.56x45mm Nitride MP? The former is $10 less. Thanks.
Was This Question Helpful?
00
C
C
CalebCompany Answer
March 07, 2025

078102001 is an M16 style bolt carrier with a full auto profile. 078000563 does not have this profile. I don't have an answer on why they are priced differently.

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00
R
R
RnzBndz
September 27, 2024
Will this Bcg work well in PSA upper 16” barrel? Thanks!
Was This Question Helpful?
10
J
J
JudeCompany Answer
October 08, 2024

If it's a 5.56 barreled upper receiver, absolutely it will

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10
C
C
Carl B.
June 20, 2024
Is this bolt rated for full auto?
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40
M
M
Matt SCompany Answer
June 21, 2024

Yes it can handle full auto.

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30
B
B
Barry Sanders
May 05, 2024
Will this BCG work well with 6.5 grendel upper? Thanks
Was This Question Helpful?
10
M
M
Matt SCompany Answer
May 06, 2024

The bcg would work in the upper but not for that caliber. You would need a 6.5grendel bcg.

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10
H
H
Howard A Yockel
October 21, 2023
will this fit a colt LE6960
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12
I
I
Isaac W.Company Answer
October 23, 2023

Yes

Was This Answer Helpful?
20
S
S
S
May 07, 2023
Am i able to use this in a m16 with the 3 position safety for a 3 round selection?
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32
K
K
Ken PiccoliCompany Answer
June 08, 2023

Yes.

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50
K
K
Kyle
March 11, 2023
What buffer and buffer spring would be recommended for this BCG. It would be used on a 16” upper.
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71
C
C
Customer CareCompany Answer
March 13, 2023

That is completely dependent on the port hole diameter on the barrel you pick.

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21
I
I
Ian
June 20, 2022
Is this proof tested and hot peened?
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14
C
C
Customer Care
June 23, 2022

they are shot peened and magnetic particle inspected, but not proof tested.

 

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30
A
A
Anthony
June 07, 2022
I want to use this in the receiver of a Can Cannon. Trying to find out if it will work in one. Its one of those things that shoots objects out of it using blanks but built on a AR platform upper. You supply the lower, BCG and charging handle. Not sure if you know about it or not. Hopefully you do.
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03
C
C
Customer Care
June 08, 2022

This BCG should work just fine.

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00
G
G
GrUMpY GuNnEr
May 14, 2022
Will this drop in a Colt Match Target H-Bar 556 SEMI AUTO.?
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21
C
C
Customer Care
May 23, 2022

Yes it will but check head space when changing out bolts.

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00