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SkagSig40
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Posted: 11/8/2013 10:26:13 PM EST
I was thinking of picking up one of these for a spare. Anyone know if these a top quality? I don't see if they are MP tested. Does anyone know if they are? They look nice and are NIBX coated. Here is a link and any info is appreciated! Many thanks!
http://www.aimsurplus.com/product.aspx?item=XAIMNiBBCGV2&utm_source=AIM+Surplus+Main+List&utm_campaign=69063e97e5-11082013&utm_medium=email&utm_term=0_6870497a6a-69063e97e5-17841109
ZoToL
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Posted: 11/9/2013 1:12:04 AM EST
I have two, one was missing some of the coating on the front face of the bcg. Ive only fired a few rounds to function test as its not in my main rifle and it was fine. Its staked properly and i'm not to concerned with a little coating missing for such a good deal. The other is in a bag in my spares and looks brand new. I was thinking of grabbing a nib version they came out with. Everything else ive got from AIM has been gtg, so I have confidence in their bcgs.
cletussd
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Posted: 11/9/2013 1:42:50 AM EST
That's enough for me to not worry about them being substandard quality.

Originally Posted By Bryan_Aim:
I will back them up if there is ever a problem.

http://www.ar15.com/forums/t_2_217/238360_Who_makes_the_AR15_M16__223_5_56_Bolt_Carrier_Group.html&page=1
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huntsimp87
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Posted: 11/9/2013 1:47:59 AM EST
They don't use Carpenter 158.
CROWDLG
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Posted: 11/9/2013 2:07:57 AM EST
[Jump To Reply]Originally Posted By huntsimp87:
They don't use Carpenter 158.

That kills it for Me.
Medicfrost
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Posted: 11/9/2013 2:38:29 AM EST
[Jump To Reply]Originally Posted By huntsimp87:
They don't use Carpenter 158.


I have no issue using 9130 over C158. I won't use 8620.
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BMRisko
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Posted: 11/9/2013 3:21:10 AM EST
[Jump To Reply]Originally Posted By Medicfrost:
Originally Posted By huntsimp87:
They don't use Carpenter 158.


I have no issue using 9130 over C158. I won't use 8620.


x2
TaylorWSO
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Posted: 11/9/2013 3:36:08 AM EST
[Last Edit: 11/9/2013 3:36:22 AM EST by TaylorWSO]
[Jump To Reply]Originally Posted By huntsimp87:
They don't use Carpenter 158.
so, its not like its 8620

has there been any objective data saying 9130 is worse???
The king of the vultures would be no less bent upon preying upon the flock than any of the minor harpies, it was indispensable to be in a perpetual attitude of defence against his beak and claws
SkagSig40
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Posted: 11/9/2013 7:12:25 AM EST
Can some one explain what all the different numbers are and which are the better product? Also is carpenter a brand? Thanks!
TaylorWSO
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Posted: 11/9/2013 7:16:10 AM EST
[Jump To Reply]Originally Posted By SkagSig40:
Can some one explain what all the different numbers are and which are the better product? Also is carpenter a brand? Thanks!
Carpenter 158 is a brand name for steel, its expensive and only sold in large lots, hence why only big companies can buy it

9130- is basically the same typemof steel-some say better-no brand name. Pissing contest happen all the time as to if its better or not.

8620 is shit for a bolt, hence all the blown up ARs bolts purchased in the panic this year, Its easier to machine-probably why so much of then ended up on the market this year.
The king of the vultures would be no less bent upon preying upon the flock than any of the minor harpies, it was indispensable to be in a perpetual attitude of defence against his beak and claws
Valintino
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Posted: 11/9/2013 9:30:32 AM EST
[Jump To Reply]Originally Posted By TaylorWSO:
Originally Posted By SkagSig40:
Can some one explain what all the different numbers are and which are the better product? Also is carpenter a brand? Thanks!
Carpenter 158 is a brand name for steel, its expensive and only sold in large lots, hence why only big companies can buy it

9130- is basically the same typemof steel-some say better-no brand name. Pissing contest happen all the time as to if its better or not.


8620 is shit for a bolt, hence all the blown up ARs bolts purchased in the panic this year, Its easier to machine-probably why so much of then ended up on the market this year.


Yep, correct me if I am wrong but the 9130 bolts are dependent upon their tempering in order for it to be stronger/longer lasting than C-158....
TaylorWSO
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Posted: 11/9/2013 9:32:24 AM EST
[Jump To Reply]Originally Posted By Valintino:


Yep, correct me if I am wrong but the 9130 bolts are dependent upon their tempering in order for it to be stronger/longer lasting than C-158....
yes but im not assuming defects as a common rule for comparison
The king of the vultures would be no less bent upon preying upon the flock than any of the minor harpies, it was indispensable to be in a perpetual attitude of defence against his beak and claws
williewvr
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Posted: 11/9/2013 11:14:36 AM EST
[Last Edit: 11/9/2013 11:21:19 AM EST by williewvr]
I have two. one unused, one has 50 rounds through the upper its in.
The gas key on the 50 rd one is loose. I have to call aim Monday and see what the solution is.
Aim has a good rep so I'm not worried but its irritating as I planned on shooting the new SBR upper today.

top two are AIM bolts, unsure of maker on other but was shocked when gas key on center bolt came loose till I got out a magnifying glass and saw no bite on screws even though it looked properly staked till I started firing.
Just put me down for a CoC violation and I won't type what I'm really thinking. Save everyone some time
Medicfrost
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Posted: 11/9/2013 11:31:29 AM EST
Why didn't you tighten it down yourself?
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Whhood
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Posted: 11/9/2013 11:35:29 AM EST
[Jump To Reply]Originally Posted By Medicfrost:
Why didn't you tighten it down yourself?


Yep. Tighten and stake. Problem solved.
williewvr
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Posted: 11/9/2013 11:39:20 AM EST
[Last Edit: 11/9/2013 11:48:30 AM EST by williewvr]
That's what I'm trying to decide now. I'm thinking about pulling it and checking the holes to make sure there's no damage and torqueing it down.
Edit: Just torqued it down, now I need to find the pic of proper staking and get off my rear and go to the vice.
Just put me down for a CoC violation and I won't type what I'm really thinking. Save everyone some time
AR15fan
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Posted: 11/9/2013 2:24:31 PM EST
[Jump To Reply]Originally Posted By SkagSig40:
Can some one explain what all the different numbers are and which are the better product? Also is carpenter a brand? Thanks!


C158 is milspec for the bolt, and expensive. 8620 is milspec for the bolt carrier and cheap.

When buying store brand BCG they may differ from the milspec significantly. For example my AIM 9310 BCG has a 9310 bolt instead of C158 and the extractor & gas key are injection molded parts. Not sure how a injection molded extractor is gonna work/last. time will tell i guess.
Nothing in this post should be considered information posted in an official capacity. It is the authors personal opinion alone.
SkagSig40
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Posted: 11/9/2013 9:58:09 PM EST
[Jump To Reply]Originally Posted By TaylorWSO:
Originally Posted By SkagSig40:
Can some one explain what all the different numbers are and which are the better product? Also is carpenter a brand? Thanks!
Carpenter 158 is a brand name for steel, its expensive and only sold in large lots, hence why only big companies can buy it

9130- is basically the same typemof steel-some say better-no brand name. Pissing contest happen all the time as to if its better or not.

8620 is shit for a bolt, hence all the blown up ARs bolts purchased in the panic this year, Its easier to machine-probably why so much of then ended up on the market this year.



So the AIM carrier is 8620 so does that mean it is shit? Why don't they just make it out of the good carpenter 158 steel?
762minigun2
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Posted: 11/9/2013 10:24:32 PM EST
[Jump To Reply]Originally Posted By CROWDLG:
Originally Posted By huntsimp87:
They don't use Carpenter 158.

That kills it for Me.



Logo kills it for me.
I am the NRA. We got the gun's. We need the numbers. Join the NRA if you have not already done so.
TX_Road_Warrior
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Posted: 11/9/2013 10:32:12 PM EST
[Jump To Reply]Originally Posted By 762minigun2:
Originally Posted By CROWDLG:
Originally Posted By huntsimp87:
They don't use Carpenter 158.

That kills it for Me.



Logo kills it for me.

They're talking about Aim, not Spike's.

...But either way.
Scaldfish
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Posted: 11/10/2013 12:59:15 AM EST
[Last Edit: 11/10/2013 2:50:19 AM EST by thebeekeeper1]
.....
Valintino
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Posted: 11/10/2013 3:18:20 AM EST
[Jump To Reply]Originally Posted By SkagSig40:
Originally Posted By TaylorWSO:
Originally Posted By SkagSig40:
Can some one explain what all the different numbers are and which are the better product? Also is carpenter a brand? Thanks!
Carpenter 158 is a brand name for steel, its expensive and only sold in large lots, hence why only big companies can buy it

9130- is basically the same typemof steel-some say better-no brand name. Pissing contest happen all the time as to if its better or not.

8620 is shit for a bolt, hence all the blown up ARs bolts purchased in the panic this year, Its easier to machine-probably why so much of then ended up on the market this year.



So the AIM carrier is 8620 so does that mean it is shit? Why don't they just make it out of the good carpenter 158 steel?


One word, money. It's always been about the greenbacks.....

Carpenter is a great metal, just expensive. 8620 is a cheaper option......
epointer
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Posted: 11/10/2013 3:29:35 AM EST
8620 is the common material for the carrier. The bolt is what is important, and should be either c158 or 9310
Medicfrost
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Posted: 11/10/2013 4:09:19 AM EST
Colt carriers are 8620. So are Noveske, Daniel Defense, PSA, Spikes, BCM, Windham, Stag, etc.
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brasidas
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Posted: 11/10/2013 4:57:52 AM EST
[Last Edit: 11/10/2013 5:03:32 AM EST by brasidas]
The mil-spec calls for 8620 carriers.

There is some dispute about the suitability of 9310 for the bolt. Some say it is actually better than C158 as long as it is properly heat treated. There are numerous threads about this. Who knows what the truth is. Nobody who uses 9310 bolts seems to be complaining. Carpenter makes both steels.

Those looks like great BCGs. One BCG I got from AIM (the one they sell without the nickel coating) had a MIM or cast gas key and extractor, but these are both machined billet on this NiB BCG. Being a high speed sponge bob watching printer repairman type, I had to put that bolt with the cast parts in one of my hobby guns.
TaylorWSO
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Posted: 11/10/2013 5:16:02 AM EST
[Last Edit: 11/10/2013 5:16:28 AM EST by TaylorWSO]
[Jump To Reply]Originally Posted By SkagSig40:
8620 is shit for a bolt,

So the AIM carrier is 8620 so does that mean it is shit? Why don't they just make it out of the good carpenter 158 steel?
I guess reading is not your forte
The king of the vultures would be no less bent upon preying upon the flock than any of the minor harpies, it was indispensable to be in a perpetual attitude of defence against his beak and claws
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