MORE LABOR DAY DEALS JUST ADDED!
Exclusive Offers + 12% Off Almost Everything Else Use Code: LABORDAY12

MORE LABOR DAY DEALS JUST ADDED!
Exclusive Savings + 12% Off Almost Everything Else Use Code: LABORDAY12

Daily Deal: Cactus Jack EDC Sling Pack ~~$34.99~~ $24.99 - Get Yours!

M16 5.56 BOLT CARRIER GROUP NITRIDE MP Reviews & Ratings

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.

See all of our AR15s and AR15 parts here.

View Product

Write a review

Reviews 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.

What Reviewers Are Saying

Product Quality

75%

Reviewers frequently praise the overall quality of the M16 bolt carrier group, highlighting its sturdy construction and reliable performance during operation. Many users express satisfaction with its fit and functionality in various builds, which enhances trust in the product's durability and efficiency.

Value for Money

70%

A significant theme is the perceived value for the price point, with many reviews expressing satisfaction that the BCG outperforms expectations for a budget item. Customers appreciate the quality relative to the cost, reinforcing the BCG as a top purchase for those on a budget.

Nitride Finish

50%

The nitride coating receives commendation for its smooth surface, which makes cleaning easier compared to traditional phosphate finishes. Reviewers have noted that this coating seems to endure wear better over time, contributing positively to the overall user experience.

Customer Service & Delivery

40%

Several users commented positively on their experiences with Brownells, emphasizing good customer service and prompt delivery. Reviewers noted that their orders often arrived earlier than expected, adding to their overall satisfaction with the purchase process.

Staking and Quality Control Issues

30%

While many reviews highlight the product's reliability, some users pointed out flaws in gas key staking and minor machining defects. A few expressed disappointment that quality control did not catch these issues before leaving the factory, suggesting that some customers may need to make adjustments prior to use.

Sort by Filter by rating

BCG

I received this BCG today so i have not used it yet. The finish and function is good. The only complaint i have is the staking of the gas key. The staking isnt very good at all. The bolts that hold the gas key may work themselves loose over time. The machine marks are a little rough also. I can file my finger nails on it if i wanted.I bought this as a spare because of the price was right and brownells is a quality company in my opinion,but i need to stake the gas key bolts better before i use this BCG. Thats something i shouldnt have to do but it is what it is. Ive tried to add a pic but it keeps saying that the file is to large

by Jason on April 05, 2023

Verified Purchase

Was this review helpful? 13

Sub par

This finish on BCG is very nice, high quality. Some tooling marks in places that won't effect function. Burrs are present on all staked screws and had to be carefully filed away. Probably wouldn't have effected function but could cut fingers or hand. Staking is not the best and I'll probably wind up reinstalling it and re-staking at some point. I don't think this item is made in China but not certain. I avoid Chinese products at all cost escpecially on a firearm.

Gas Key staking is lacking

For the price, this appears to be a decent BCG. The nitride finish is very slick and I can tell it's going to be easy to clean. Having said that, the gas key staking is sub par. QC should have caught this and never light it slide. The material doesn't even touch the screws. Disappointing to say the least.