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AR15.COM
10/19/2010 3:47:40 PM EDT

 The thing is on there solid. I can't tell how it's attached.


10/19/2010 3:49:06 PM EDT
[#1]
Silver solder probably.
10/19/2010 3:54:20 PM EDT
[#2]
Lil bit of info I found. http://www.thehighroad.org/showthread.php?s=7b75089479be29c102ae83d06677c41e&t=237456
10/19/2010 4:43:05 PM EDT
[#3]

No more idea's ?   super glue maybe ....
10/19/2010 4:48:44 PM EDT
[#4]
I wonder if they used some sort of adhesive. I don't know of any process that can be used to solder aluminum to steel.

10/19/2010 5:52:16 PM EDT
[#5]
Maybe it was sweated on? We do that alot at work.