When extracting an attribute make sure its an upgrade, just realized it told me that I had an upgrade available but when looking at it it did not look like I was gaining any thing. Said I could upgrade weapon swap speed to 11%, so went to the recal station and looked and swap speed was already 11%.
Even went ahead and changed one of the AR's attributes for the swap speed and it was 11%, then did the extraction which it did normally but for no benefit since I was already at that level. Unfortunately I did not pay attention to which gun it was taking it from and so could not verify that it actually did destroy a weapon in the process, but for now I would just assume it worked like normal and the weapon used was destroyed.