Spent way too much time trying to f**k with the game enough, but no matter what I did I was unable to send a weapon that's equipped. Even using loadouts. Based on your log, mine and your game operates differently. Mine unequips the mods the same time as my weapon, whereas yours it seems like it's switching the mods rather than unequipping them when the weapon is changed.
[image: wenno.cgas.io]
Since there's a prevention for sending items that are equipped, it might actually be a thing that attachments are still on the gun which is so amusing to me because it's such a stupid bug. Maybe it's something to do with using multiple tabs on mobile and those having different data on the pages cached or something technical like that. I couldn't replicate it, but I'd love for CJ to give an explanation if he's able to
[image: wenno.cgas.io]
Like the log doesn't even make sense. It somehow just broke itself. [image: wenno.cgas.io]
WE HAVE A BREAKTHROUGH, IT'S LEGIT
[image: wenno.cgas.io]
Before:
[image: wenno.cgas.io]
After:
[image: wenno.cgas.io]
So it's gone from my inventory. And my friend's mods right now, with no equipped weapons that have mods on and his mods show this: Those are MY MAGAZINES
My friend's mods with no attachments on his equipped weapons:
[image: wenno.cgas.io]
His inventory:
[image: wenno.cgas.io]
I can confirm that this is due to some weird shit with tabs on PDA, maybe how they are loaded? I had the weapon with mods on (PC), equipped a new weapon and unequipped. Switched my tab on PDA to the mods page I had preloaded and quickly tapped on a mod to equip and my events then showed that I equipped a mod even though I didn't have a weapon equipped. Then I sent the weapon. I assume I could of refreshed my page in my inventory and I would of had attachments on an unequipped weapon. It's gotta be something funky with skipping the check for if a you have the weapon equipped while trying to put a mod on. I don't think your friend is going to be able to send those mods back in a traditional way
My friend sent me my weapon back now, and it's in my inventory with the mod equipped but the weapon is not equipped. So yeah it shouldn't be possible to do, definitely a bug. Wonder which would be easier to fix, patching so under no circumstances mods can be equipped to unequipped weapons, or like a bandaid fix and having a check in place for mods being equipped when sending weapons.
My inventory now:
[image: wenno.cgas.io]
This was fun, hopefully the extra information helps staff replicating and fixing the bug, sorry for originally being dismissive and thinking it was a noob issue not looking at the right place.
EXTRA BUG, KINDA
With the mod equipped, I could list the weapon on my bazaar. Sold to friend, and again the mod was still equipped. (He sent it back) Definitely something to be looked at, as you could essentially sell attachments to people who need them. I imagine that's very against the rules though, definitely look into a fix for that. Also, when adding to my display case--the AK74U doesn't show having a mod equipped like it does when looking at my inventory. Still does have the mod equipped, and the mod disappears from my mods when it's in my display case. Still retains the attachment though.
PS: The attachment I have on now is extra mags x1 since I sometimes use x2
Update: Here's a screen recording from mobile replicating it for ease of access, as you can see the mod is equipped with no weapon equipped. It's able to be sent/sold like that.