Quality of AIM Surplus BCG? - Page 2

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[ARCHIVED THREAD] - Quality of AIM Surplus BCG? (Page 2 of 2)

Posted: 1/3/2014 11:44:57 PM EDT

[#1]

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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.

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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.

Where did you get this information? Are you sure of this?

Posted: 1/4/2014 4:19:13 AM EDT

[#2]

They mention materials on a thread in the their industry forum for some BCG they sell.

Posted: 1/10/2014 4:54:11 PM EDT

[#3]

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Quoted:

Where did you get this information? Are you sure of this?

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Quoted:

Quoted:
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.

Where did you get this information? Are you sure of this?

Don't listen to him, they are not injection molded, they are most definitely machined, at least the one i just got is.

Posted: 1/10/2014 5:00:28 PM EDT

[#4]

Well mine finally arrived. I was able to compare it to the WMD Guns BCG that i had. The nickel boron finish is excellent, it looks just like the WMD guns BCG, however there are several deep scratches on the bolt carrier, and rough machining marks everywhere, especially on the gas key. None of this should affect function, i don't care at all, i'm just mentioning it to those cheap people who want grade A quality, for a Grade C price. This BCG is definitely a grade C, passes but doesn't go above and beyond.

--The gas key is properly staked, they most definitely used some sort of press jig set up to do this, looks identical on both sides, not punched by hand.
--Extractor and cap screws are not Nickel Boron plated.
--Extractor is labeled for MPI, but i hope that means the whole bolt is MPI.
--Gas key is machined, you can tell from all the rough marks.

Overall i'm very satisfied with my purchase, if you can stand the blemishes, it should be an adequate BCG. You have to wait till it warms up for me to shoot it.

Here are some pics comparing it to my WMD guns BCG above.