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View Full Version : Nitride BCGs with Chrome Question


Coogan
08-14-21, 09:58
Dumb questions:

1. Has anyone made a nitrided bolt carrier that was chromed inside?

2. Has anyone made a nitrided gas key that was chromed inside?

3. Has anyone ever offered the above as a regular production item in any manner?

I'm pretty sure the answers are: possibly, possibly, no.
556Cliff
08-14-21, 10:11
Check with Cryptic Coatings. I thought their nitride BCG has a chromed gas key and carrier interior, but I might be wrong.
Coogan
08-14-21, 10:29
Check with Cryptic Coatings. I thought their nitride BCG has a chromed gas key and carrier interior, but I might be wrong.

Not advertised as such and the pic of the BC does not show chrome. They do use chrome for the PVD and DLC BCs.
jsbhike
08-14-21, 12:59
Dumb questions:

1. Has anyone made a nitrided bolt carrier that was chromed inside?

2. Has anyone made a nitrided gas key that was chromed inside?

3. Has anyone ever offered the above as a regular production item in any manner?

I'm pretty sure the answers are: possibly, possibly, no.

Can be done. No idea if all do it or not.


https://youtu.be/OrGTLi9r_mw
Coogan
08-14-21, 13:43
Can be done. No idea if all do it or not.


https://youtu.be/OrGTLi9r_mw

Interesting - that Brownells part number is for a mil-spec phosphate BCG (EDIT TO ADD: in the comments Brownells indicates that the video is wrong, the nitride BCG does not have chrome)

https://www.brownells.com/rifle-parts/bolt-parts/bolt-carrier-groups/m16-phosphate-bolt-carrier-group-mp-c158-sku078000250-78714-159980.aspx?sku=078-000-250
lysander
08-14-21, 15:55
It would be kind'a pointless to chromium plate over a nitrided finish.

It would be like putting latex paint over a nice lacquered finish.
Coogan
08-14-21, 16:51
It would be kind'a pointless to chromium plate over a nitrided finish.

It would be like putting latex paint over a nice lacquered finish.

Agreed.

I'm in a discussion with a mod on another site and before I go scorched earth I want to be sure that the likelihood that a major AR manufacturer has ever used a nitrided BCG with chrome is about nil. Honestly at this point I cannot find proof that one was ever even made...
KITTEN_FRENZY
08-14-21, 18:18
RCA offers nitriding to LMT E carriers, so I assume it's a thing.
jsbhike
08-14-21, 21:16
Interesting - that Brownells part number is for a mil-spec phosphate BCG (EDIT TO ADD: in the comments Brownells indicates that the video is wrong, the nitride BCG does not have chrome)

https://www.brownells.com/rifle-parts/bolt-parts/bolt-carrier-groups/m16-phosphate-bolt-carrier-group-mp-c158-sku078000250-78714-159980.aspx?sku=078-000-250

Didn't read the comments.:(

They need to pull or tweak some videos. They have another one that has some nugget of wrong info I noticed within the last few months.
Coogan
08-16-21, 08:07
Didn't read the comments.:(

They need to pull or tweak some videos. They have another one that has some nugget of wrong info I noticed within the last few months.

I didn't either until I started trying to figure out the part number discrepancy.

I give them a bit of leeway - they have thousands of products they sell and they try to do informative videos. However, one that is wrong being "up" for 5 years or so is a bit silly.