danb
dont be a dumbass
Nope.
If that were the case, it would be illegal to:
Disassemble a magazine for cleaning. Or
Change out a follower spring with a new one.
Because:
The law does not state that it is illegal to modify an existing high capacity magazine, only that it is illegal to manufacture one.
Which means that disassembly and reassembly is legal, but assembly of parts not already assembled constitutes manufacture.
The difference is the intent to manufacture a new one from different set of parts with a higher capacity. Before an anti-gun judge and jury, it's a solid win.