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M16 5.56 BOLT CARRIER GROUP Reviews & Ratings

Complete, mil-spec assembly with bolt, bolt carrier, and firing pin ready to drop into the rifle or carbine upper of your choice. Each bolt assembly is high pressure tested and magnetic particle inspection tested to ensure it’s free from imperfections that can lead to premature failures. Properly staked gas key prevents gas leakage that can lead to short stroking. M16-style carrier on the black phosphate model has full-length shroud for tripping auto sear, so this carrier may be installed on full-auto law enforcement and military rifles. Carrier and gas key are chrome lined for smooth cycling and resistance to wear from hot combustion gases for years of dependable service.

SPECS: Steel, black parkerized finish. Fits mil-spec semi-auto and full-auto AR-15/M16 upper receiver chambered for .223/5.56mm.

See all of our AR15s and AR15 parts here.

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Reviews Summary

The Colt M16 5.56 Bolt Carrier Group impresses with solid craftsmanship and generally excellent functionality. However, several reviews noted quality control issues, including loose bolts and improper gas key installation. While some users remain loyal to Colt, others express disappointment over perceived declines in quality and inconsistent markings, leading to mixed purchasing experiences.

What Reviewers Are Saying

Product Quality

55%

The quality of the Colt M16 bolt carrier group garners mixed reviews. While many customers praise its craftsmanship and performance, others report quality control issues, such as loose bolts and poorly staked gas keys, raising concerns about reliability from such a premium brand.

Quality Control Issues

45%

Numerous reviewers emphasize problems with quality control, including inconsistent markings, scratches, and machining flaws. These issues often contradict the expectations set by Colt's reputation for quality, prompting disappointment and hesitation from loyal customers.

Value for Money

40%

While some users believe the product justifies its premium price due to expected quality, others feel that it underdelivers for the cost. The inconsistencies in manufacturing lead some to regret not opting for more cost-effective alternatives.

Customer Service

50%

Customer service receives high praise, particularly in handling returns and exchanges due to quality issues. Reviewers express appreciation for Brownells' responsiveness, contrasting their positive experience with the product issues.

Brand Loyalty vs. Expectations

38%

Long-time Colt customers show divided opinions as some remain loyal to the brand, while others express that Colt is no longer the gold standard it once was. This dissatisfaction arises from experiences that didn't meet previously high standards, prompting some to explore alternatives.

Shipping and Packaging

30%

Concerns related to shipping and packaging highlight issues like inadequate protective wrapping resulting in scratches or dings on the product, which is particularly disappointing given the price point. Customers expected better handling for premium items.

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Colt isnt Colt anymore

Functionally there is nothing wrong with this bolt carrier group. It is decent machining, in spec, and the key seems to be installed correctly. This is an adequate part. I would never be able to sell it and upgrade because I paid over $200 for a Colt part with no marking to prove it to be a Colt instead of a PSA or any other unmarked BCG. I bought it because I wanted a Colt BCG to go in my 6960 upper. I wish Id have just waited and spent $50-75 less to buy a Sons of Liberty, Sionics, Centurion, Modern Armory, or just spent similar money to buy a KAC Sandcutter. Those companies are at least still proud enough of their work to put their name on it. I truly hope CZ cleans house at Colt, and makes them relevant again.

Colt bcg

I ordered two, both came wrapped in thin layer of plastic and the envelope was one layer of thin bubble wrap that looked like someone used as a hockey puck, so both had minor scratches and dings, both work fine after some file work but would expect better protection for something that cost me that much.

Its a genuine colt bcg sp64028

I wrote another review, I was not impressed, but upon further looking I had to eat crow,their is a very faint c on the left side of the carrier,upon looking more on the bolt their is a mpc very faint and letter A,its phosphate,I think i was expecting this to be a piece of gold for the price,and my expectations were higher than what I got,it did come in a white and clear plastic bag says colt manufact bolt carrier assembly and the cage number sp64028 on it,I have enclosed pics of the c which looked to be a lack of quality ,their is no white dot,I called colt and brownells, colt told me they don't mark anymore as brownells the same. The c is questionable but its theirs.i enclosed a pic of a nitrate aero bcg,next to the colt bcg,I bought this for a le6921 colt upper I also bought from brownells, I installed and racked the charge handle and it feels good

GTG

Dropped it in, went shooting no problems.