From the January 5th Livestream summary notes available on Dulfy's website:
"Unassembled gear pieces – earned from Ops bosses or purchased with Unassembled components. Last boss of an operation have a guaranteed chance to drop a specific Unassembled Gear piece while other bosses have an increased chance to drop these gear pieces as you get further into the operation."
So yes, in your example he will indeed. If you want to read the full summary or watch the actual stream, you can do a google search for "January 5th live stream coverage" to find it.
Also, the patch adding these changes isn't coming until next Tuesday (Jan. 24th).
From the January 5th Livestream summary notes available on Dulfy's website: "Unassembled gear pieces – earned from Ops bosses or purchased with Unassembled components. Last boss of an operation have a guaranteed chance to drop a specific Unassembled Gear piece while other bosses have an increased chance to drop these gear pieces as you get further into the operation." So yes, in your example he will indeed. If you want to read the full summary or watch the actual stream, you can do a google search for "January 5th live stream coverage" to find it. Also, the patch adding these changes isn't coming until next Tuesday (Jan. 24th).