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Q&A for FailZero M16/M4 Bolt Carrier Group (BCG), No Hammer — 12 Questions & 11 Answers

Name FailZero M16/M4 Bolt Carrier Group (BCG), No Hammer (4)
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Q
none, guest, from OH, United States, asked on January 08, 2020

on the M16/M4 Bolt Carrier Group ,,What does it mean by No Hammer??

Expert Answer
A
Answered by Armando R., Gear Expert, from IL, United States, on March 23, 2020

It means it will not come with a hammer for the trigger group. Some of the FailZero bolt carrier groups come with a nickel boron coated hammer, but these models will not come with that hammer.

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Q
Osceola126, member, from FL, United States, asked on July 27, 2019

Will this BCG work with a 350 legend? My understanding is the 350 uses a standard 5.56/223 bolt.

Expert Answer
A
Answered by Armando R., Gear Expert, from IL, United States, on September 12, 2019

Yes, technically the .350 Legend can use a standard AR-15 bolt carrier group.

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Q
Adam Miller, guest, from FL, United States, asked on July 23, 2021

Can I use my stander black mil. Spec. Hammer or would I need a nickel hammer?

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A
Answered by Nick B., Gear Expert, from IL, United States, on October 22, 2021

You can use your standard hammer.

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Q
Ian M, guest, from MI, United States, asked on December 09, 2020

.300 Blackout?

Expert Answer
A
Answered by Nick B., Gear Expert, from IL, United States, on October 22, 2021

Yes, this can be used with .300 Blackout.

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Q
Johnny vilcox, member, from MD, United States, asked on January 13, 2020

I can put this in my Ruger AR-556 correct

Expert Answer
A
Answered by Armando R., Gear Expert, from IL, United States, on March 23, 2020

Yes, it will work with any standard direct impingement AR including the AR-556.

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Q
Matthew, guest, from CA, United States, asked on June 02, 2019

Could I run this in a carbine length at. Also shoot 223 & 556?

Expert Answer
A
Answered by Jonathan D., Gear Expert, from IL, United States, on June 17, 2019

Yes, you can.

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Q
Robert Thomas, member, from IN, United States, asked on March 03, 2019

Is this a full auto bcg

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A
Answered by Jonathan D., Gear Expert, from IL, United States, on June 17, 2019

Yes, it is.

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Q
Will, member, from FL, United States, asked on December 07, 2018

The black bcg, is it an exo coat finish?

Featured Answer
A
Answered by tinyD, member, from GA, United States, on March 02, 2019

it's nickel boron coated and then has a black top coat. The black will show wear in contact areas revealing the nickel finish below but maintain it's black finish in all noncontact areas.

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Q
Tony, member, from MI, United States, asked on October 01, 2018

Is this Nickle Boron? And what type of steel is bolt and carrier? Not enough information on you products. Makes it hard to make desicion on product

Expert Answer
A
Answered by Ethan C., Gear Expert, from IL, United States, on February 20, 2019

The manufacturer does not provide the specific grade of stainless steel they use for their bolt carrier group, however the following parts are all nickel boron treated:
Bolt & Extractor
Bolt Carrier
Extractor
Cam Pin
Carrier Key
Firing Pin

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Q
Dante, member, from TX, United States, asked on April 10, 2025

If I have a brand new Stag Arms 16” .223 Wylde, can I drop this into my AR-15? What happens if it doesn’t or will it fail the Headspace check?

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