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Posted: 8/2/2009 12:04:55 PM EDT
[#1]
Quoted:
I am selling a rifle on gunbroker and the buyer asked me if it was a Beryllium copper lower. I thought he was fucking with me, and then he sent me this chart from Olympic showing my serial number range as having a copper lower. Just one year. Is this valuable, odd? should I keep it? It also looks like it is a genuine Pre-Ban. I wonder if I am asking too little for it. link FYI, my lower is TB96xx. According to your chart you have the current model. Yours being TB96xx (at the very bottom) and the Beryllium copper S/N being TBOR1791-TBOR1991. |
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Posted: 8/2/2009 12:05:59 PM EDT
[#2]
Yeah, just noticed that. Thanks.
Does anyone now anything about the Copper lowers? It has piqued my interest |
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Posted: 8/2/2009 12:11:25 PM EDT
[#3]
Beryllium, in and of itself can be some nasty shit.
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Posted: 8/2/2009 12:33:59 PM EDT
[#4]
Pretty sure I have a golf club, lob wedge, made of that. I don't know if I'd really want a lower from the same stuff.
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Posted: 8/2/2009 12:35:20 PM EDT
[#5]
http://en.wikipedia.org/wiki/Beryllium_copper
Interesting, but I don't know what advantage over a standard receiver it would give you. |
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Posted: 8/2/2009 1:13:43 PM EDT
[#6]
Quoted:
Interesting, but I don't know what advantage over a standard receiver it would give you. Marketing. |
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Posted: 8/2/2009 1:54:19 PM EDT
[#7]
Beryllium copper, depending on the exact alloy, can be very strong, but it is also very heavy. As long as you don't grind, weld or burn it its toxicity would not be a concern. I can't think of any good reason to use it, you might as well use high strength steel.
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Posted: 8/2/2009 2:30:01 PM EDT
[#8]
You would KNOW it. Heavy. Over 22 ounces in weight. A regular receiver is about 8 ounces, stripped bare.
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Posted: 8/2/2009 2:30:02 PM EDT
[#9]
BC was also used in 60% & 80% AR15 DIY lower receivers. Some guys polished them for a copper look to them.
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Posted: 8/2/2009 2:30:48 PM EDT
[#10]
We use to use Tools made from it to work in side fuel cells , it was non sparking , but I dont see why it would be used for a AR15 llower
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Posted: 8/2/2009 3:01:53 PM EDT
[#11]
B.C. Is available in different grades.
I seem to remember the B.C. lowers were used to make a small number of commemorative rifles or some such. O.P., Have you tried a google type search yet ? |
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Posted: 8/2/2009 4:54:02 PM EDT
[#12]
I seem to recall some arms maker promoting 'unbreakable' BC firing pins, but I can't see the advantage in using it for a lower.
Moon |
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Posted: 8/2/2009 7:28:54 PM EDT
[#13]
J&S Gun Parts Inc. in Olympia, Wa use to have an ar on display that had a bc upper and lower with walnut furniture. One of the owners told me he had paid an ungodly amount for it. Was also told the maker quit making these because it was killing him. Did look pretty gawdy and was very heavy.
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Posted: 8/2/2009 8:32:06 PM EDT
[#14]
Based on the serial number you posted yours is not BC. as it is lacking the following "OR". BC is typically used where the metal will be used in a flammable environment. Given that the dates for these was 1991, the oil fields in the first gulf war come to mind. BC will not spark. Do some research on flammable drum handling equipment and you'll see that it is all BC. It is very nasty stuff to work with, I haven't machined any since high school 30+ years ago. We didn't know how poisoness it was back then. But we also case hardened steel using Cyanide and cleaned parts in 11 trichloroethene. I guess if you don't know it's going to kill you -it won't.
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