Can't disassemble copper tubing without Internal Toolset CBM

Title says it all. Trying to craft .50 BMG Ball ammo, need copper. Not scrap copper, copper tubing, just “copper (x)”. When I try to disassemble my copper tubing it says “need internal toolset with at least 10 charges”.
Is this a bug or a feature? :stuck_out_tongue:
It seems to me a hacksaw or a toolbox and some fire should do the job. Perhaps a future option to melt down metal items in a forge?
The CDDA item browser “can be obtained for disassembling” for copper is also screwed. Not sure if that means anything. Here’s a link: https:// cdda.estilofusion .com/copper

It’s toolset or fire. :V