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GunnySwagger
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Posted: 10/30/2012 3:32:52 PM EST
Are these good to go? I've heard that CMT supplies parts to Colt, Noveske, LMT and other top notch brands, but that doesn't necessarily mean their BCG's are something to write home about. So, three questions:

1. What companies use CMT BCG's? (if any)

2. Where does CMT rank in the broad scheme of top notch BCG's, like BCM?

3. Who makes BCM's BCG's? (if known)
maleante
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Posted: 10/30/2012 3:49:51 PM EST
Originally Posted By GunnySwagger:
Are these good to go? I've heard that CMT supplies parts to Colt, Noveske, LMT and other top notch brands, but that doesn't necessarily mean their BCG's are something to write home about. So, three questions:

1. What companies use CMT BCG's? (if any)

2. Where does CMT rank in the broad scheme of top notch BCG's, like BCM?

3. Who makes BCM's BCG's? (if known)


Answers:

Don't know, don't know, don't know, and nobody can tell you with absolute certainty.

Are CMT parts "good to go"? YES.
"I explained to the gun grabbers of DU, in detail, exactly how they could essentially eliminate private gun ownership in the US within a generation" http://www.ar15.com/forums/t_1_130/1379229_.html
CNZ302
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Posted: 10/30/2012 3:56:43 PM EST
I'm pretty sure BCM makes their own. I could be wrong so hopefully someone rose that knows for sure chimes in.
GunnySwagger
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Posted: 10/30/2012 4:27:41 PM EST
Well that's good to know haha

I'm gonna snag one on monday
ricochet7
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Posted: 10/30/2012 4:55:17 PM EST
I do not know the answers to all your questions, but believe Stag is part of the CMT group.
I also remember a few years ago, CMT offered full auto and semi-auto carriers- no problem, both were quality.
They also offered bolts that were HP/MPI tested and non-tested. There was a small upcharge for the tested bolts.
This does not mean one is better than the other, many prefer HP/MPI as do I.
I owned both in the past, and they served me well- I am not current on if this is still their practice.
I believe most companies only list CMT in HP/MP now, should be easy to verify. CMT is big, probably do make for other companies.
"Light travels faster than sound. This is why some people appear bright until you hear them speak. " - Bill Cosby
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GunnySwagger
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Posted: 10/30/2012 4:59:21 PM EST
Originally Posted By ricochet7:
I do not know the answers to all your questions, but believe Stag is part of the CMT group.
I also remember a few years ago, CMT offered full auto and semi-auto carriers- no problem, both were quality.
They also offered bolts that were HP/MPI tested and non-tested. There was a small upcharge for the tested bolts.
This does not mean one is better than the other, many prefer HP/MPI as do I.
I owned both in the past, and they served me well- I am not current on if this is still their practice.
I believe most companies only list CMT in HP/MP now, should be easy to verify. CMT is big, probably do make for other companies.


Well from what I've been able to gather, Stag is the commercial, civilian part of CMT . Not sure if this is accurate or not.

The site i'm looking at doesn't specify if the bolt is HP/MPI or not, so I'll shoot them an email and see.
Alpha-Romeo3
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Posted: 10/30/2012 5:10:54 PM EST

Originally Posted By member boltcatch:
Top to bottom, BCG pulled from a new Sabre Defence upper, CMT M16 BCG, and RRA enhanced carrier.
Ref. thread: Proper Staking of Carrier Key Screws - content link

Note that this was in 2006 the CMT at the middle have a very bad carrier key staking, not sure if they are properly staked now, I had one and I bought a new BCM gas key kit and I installed it and properly side staked it.



Here's some examples of properly side staked auto carriers, Colt at left the rest are LMT vintage pre-MIM gas keys.



Originally Posted By GunnySwagger:
Are these good to go? I've heard that CMT supplies parts to Colt, Noveske, LMT and other top notch brands, but that doesn't necessarily mean their BCG's are something to write home about. So, three questions:

1. What companies use CMT BCG's? (if any)

2. Where does CMT rank in the broad scheme of top notch BCG's, like BCM?

3. Who makes BCM's BCG's? (if known)


Answers:

1. Stag uses CMT BCG and all other AR parts.

2. CMT BCG are batch tested HPT & MPI same as other commercial type manufacturers.

3. BCM, Colt, and AR Performance BCG have the same manufacturer.


YMMV

AR3
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Posted: 10/30/2012 5:20:09 PM EST
[Last Edit: 10/30/2012 5:20:51 PM EST by Direct-Drive]
Originally Posted By Alpha-Romeo3:
http://i2.photobucket.com/albums/y41/boltcatch/carriers.jpg
Originally Posted By member boltcatch:
Top to bottom, BCG pulled from a new Sabre Defence upper, CMT M16 BCG, and RRA enhanced carrier.
Ref. thread: Proper Staking of Carrier Key Screws - content link

Note that this was in 2006 the CMT at the middle have a very bad carrier key staking, not sure if they are properly staked now, I had one and I bought a new BCM gas key kit and I installed it and properly side staked it.


http://i6.photobucket.com/albums/y232/Alpha-Romeo3/Hunting%20Tech/COLT_l_LMT_M_LMT_R-stake-L197-2-1.jpg
Here's some examples of properly side staked auto carriers, Colt at left the rest are LMT vintage pre-MIM gas keys.



Originally Posted By GunnySwagger:
Are these good to go? I've heard that CMT supplies parts to Colt, Noveske, LMT and other top notch brands, but that doesn't necessarily mean their BCG's are something to write home about. So, three questions:

1. What companies use CMT BCG's? (if any)

2. Where does CMT rank in the broad scheme of top notch BCG's, like BCM?

3. Who makes BCM's BCG's? (if known)


Answers:

1. Stag uses CMT BCG and all other AR parts.

2. CMT BCG are batch tested HPT & MPI same as other commercial type manufacturers.

3. BCM, Colt, and AR Performance BCG have the same manufacturer.



No, he makes his own bolts.....easy to verify......see AR-P super bolts.
He buys his carriers.

ricochet7
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Posted: 10/30/2012 5:22:39 PM EST
[Last Edit: 10/30/2012 5:27:29 PM EST by ricochet7]
My CMT gas keys were staked pretty fairly well, maybe a little light compared to some, but adequate (from somewhere in 96-97 or so).

And this is quoted from Ranier arms site, I had it somewhere else also:

Product Information

CMT / STAG Arms 5.56 Bolt

STAG Arms replacement bolt. MPI (Magnetic Particle Inspection) checks for surface cracks and defects that could not be seen by the human eye. So the parts that are most prone to failure (bolt & barrel) should be double checked by this process. Not all CMT bolts are MPI tested. You can choose between Standard or MPI tested bolts below.


*MPI Bolt Pictured

Edit for clarity
"Light travels faster than sound. This is why some people appear bright until you hear them speak. " - Bill Cosby
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GunnySwagger
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Posted: 10/30/2012 5:24:12 PM EST
That helps a little, thanks Alpha!

And what makes me think something is a little off with the AR world is that Colt, BCM, and AR performance BCG's are $180, $160, and $125, from each of their respective websites... So if what you say is true, which seems legit from what I've learned about actual "manufacturers" recently, then why pay more for the SAME EXACT THING?!
GunnySwagger
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Posted: 10/30/2012 5:25:24 PM EST
Originally Posted By ricochet7:
My CMT gas keys were staked pretty well, maybe a little light compared to some, but adequate (from somewhere in 96-97 or so).

And this is quoted from Ranier arms site, I had it somewhere else also:

Product Information

CMT / STAG Arms 5.56 Bolt

STAG Arms replacement bolt. MPI (Magnetic Particle Inspection) checks for surface cracks and defects that could not be seen by the human eye. So the parts that are most prone to failure (bolt & barrel) should be double checked by this process. Not all CMT bolts are MPI tested. You can choose between Standard or MPI tested bolts below.

*MPI Bolt Pictured


I just saw that while doing some google searching
warpig8654
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Posted: 10/30/2012 5:33:58 PM EST
Originally Posted By CNZ302:
I'm pretty sure BCM makes their own. I could be wrong so hopefully someone rose that knows for sure chimes in.


BCM DOES NOT manufacture their own bcg's.
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GunnySwagger
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Posted: 10/30/2012 6:34:14 PM EST
Originally Posted By warpig8654:
Originally Posted By CNZ302:
I'm pretty sure BCM makes their own. I could be wrong so hopefully someone rose that knows for sure chimes in.


BCM DOES NOT manufacture their own bcg's.


Thanks sir, do you happen to know which company makes them?
warpig8654
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Posted: 10/30/2012 6:44:20 PM EST
Originally Posted By GunnySwagger:
Originally Posted By warpig8654:
Originally Posted By CNZ302:
I'm pretty sure BCM makes their own. I could be wrong so hopefully someone rose that knows for sure chimes in.


BCM DOES NOT manufacture their own bcg's.


Thanks sir, do you happen to know which company makes them?


A few years ago (non-BCM laser etched logo) they were CMT bcg's manufactured to BCM specs. I have no idea who makes the current examples for them.

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GunnySwagger
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Posted: 10/30/2012 6:49:21 PM EST
Originally Posted By warpig8654:
Originally Posted By GunnySwagger:
Originally Posted By warpig8654:
Originally Posted By CNZ302:
I'm pretty sure BCM makes their own. I could be wrong so hopefully someone rose that knows for sure chimes in.


BCM DOES NOT manufacture their own bcg's.


Thanks sir, do you happen to know which company makes them?


A few years ago (non-BCM laser etched logo) they were CMT bcg's manufactured to BCM specs. I have no idea who makes the current examples for them.

Semper Fi!


That's interesting to know



Semper Fi!
CNZ302
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Posted: 10/30/2012 6:50:46 PM EST
Originally Posted By warpig8654:
Originally Posted By CNZ302:
I'm pretty sure BCM makes their own. I could be wrong so hopefully someone rose that knows for sure chimes in.


BCM DOES NOT manufacture their own bcg's.


Like I said. I could be wrong.
Unicorn
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Posted: 10/30/2012 8:29:27 PM EST
It doesn't matter if they make parts for other companies or not. Those companies tell CMT how they want those parts made. What steel, what tolerances, what hardness, everything else. They could make 7 different types of bolts for 5 companies. It's what they spec for themselves that's important.
Stevesc
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Posted: 10/31/2012 5:00:26 AM EST
[Last Edit: 10/31/2012 5:02:26 AM EST by Stevesc]
There are three USGI bcg manufacturers, CMT ,FN, Larue. USGI are all MP,HP tested.
CMT commecial bolts are only batch tested, some vendors may order theirs tested or test themselves. The manufacturing ,material and process is the same as USGI.

RRA used to be all CMT commercial, now I don't know. But I would buy RRA simply because I trust their quality rigor.

Bcgs are not hard to make, many small machine shop do it. To what quality, consistency is unknowable.
GunnySwagger
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Posted: 10/31/2012 6:06:37 AM EST
Originally Posted By Stevesc:
There are three USGI bcg manufacturers, CMT ,FN, Larue. USGI are all MP,HP tested.
CMT commecial bolts are only batch tested, some vendors may order theirs tested or test themselves. The manufacturing ,material and process is the same as USGI.

RRA used to be all CMT commercial, now I don't know. But I would buy RRA simply because I trust their quality rigor.

Bcgs are not hard to make, many small machine shop do it. To what quality, consistency is unknowable.


Well that sums that up I guess
CNZ302
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Posted: 10/31/2012 6:24:32 AM EST
[Last Edit: 10/31/2012 6:25:52 AM EST by CNZ302]
Originally Posted By Stevesc:
There are three USGI bcg manufacturers, CMT ,FN, Larue. USGI are all MP,HP tested.
CMT commecial bolts are only batch tested, some vendors may order theirs tested or test themselves. The manufacturing ,material and process is the same as USGI.

RRA used to be all CMT commercial, now I don't know. But I would buy RRA simply because I trust their quality rigor.

Bcgs are not hard to make, many small machine shop do it. To what quality, consistency is unknowable.


Huh? RRA is your choice?

OP, get a BCM and call it a day. They were in stock last night.

GunnySwagger
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Posted: 10/31/2012 6:51:50 AM EST
Originally Posted By CNZ302:

OP, get a BCM and call it a day. They were in stock last night.



As opposed to CMT for what reason? Just because? Or is there a legit reason?
myitinaw
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Posted: 10/31/2012 6:58:00 AM EST
Originally Posted By GunnySwagger:
Originally Posted By CNZ302:

OP, get a BCM and call it a day. They were in stock last night.



As opposed to CMT for what reason? Just because? Or is there a legit reason?


Buy once, cry once, quality, and a proven performer.


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And yet, they are most certainly emotionally retarded.

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GunnySwagger
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Posted: 10/31/2012 7:04:40 AM EST
Originally Posted By myitinaw:


Buy once, cry once, quality, and a proven performer.




But apparently CMT makes BCM's BCG's....
HeavyMetal
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Posted: 10/31/2012 7:06:52 AM EST
Originally Posted By Stevesc:
There are three USGI bcg manufacturers, CMT ,FN, Larue. USGI are all MP,HP tested.
CMT commecial bolts are only batch tested, some vendors may order theirs tested or test themselves. The manufacturing ,material and process is the same as USGI.

RRA used to be all CMT commercial, now I don't know. But I would buy RRA simply because I trust their quality rigor.

Bcgs are not hard to make, many small machine shop do it. To what quality, consistency is unknowable.


Microbest and Toolcraft.
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warpig8654
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Posted: 10/31/2012 7:11:13 AM EST
Originally Posted By GunnySwagger:
Originally Posted By myitinaw:


Buy once, cry once, quality, and a proven performer.




But apparently CMT makes BCM's BCG's....


They made them at one point. None of my most recent BCM bcgs appear to be CMT.
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GunnySwagger
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Posted: 10/31/2012 7:30:47 AM EST
Originally Posted By warpig8654:

They made them at one point. None of my most recent BCM bcgs appear to be CMT.


How can you tell?
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