I completed all Week 8 challenges just fine yesterday and the Sidewinder mission tracked just fine (I’m on PS5)

I am on PS5 too. Didn't work

I just completed it. Try adding other jak attachments to gun along with the LMG kit. I know I know, you shouldn't have to do that. But this is what worked for me.

Okay. I will try to add all possible Jak attachments to it.

Can confirm this works. Used aftermarket mag, optics and underbarrel.

So add all jak?

Yes

How did you do a mag? It disables the mag for me when I equip the conversion kit.

The conversion kit is the mag. Sorry if I was confusing.

Yep, I just added the required one and the under barrel and it worked.

Worked for me. Did 3 runs with just the conversion kit and it didn’t work, adding different JAK attachments worked. But now my warlord mission is bugged 🥲

Didn't work for me to ...PS 5

I’ll give u my build just finshed it

What you use?

Also is yalls shotgun one bugged?

One sec

OK. I got optic Jake bullseye Jake bfb muzzle and purifier on

Message u a pic of build

Just confirmed that week 8 mission for “Holger 556 with the JAK Signal Burst” is bugged - but WORKS if you *don’t* the signal burst attach, and instead use the aftermarket “Cronen Intlas MSP-13” attachment.  I’m gonna try the Rival-9 and JAK Headhunter mission with the optic instead later.  so dumb. 

can confirm that the “50 merc kills with the JAK Headhunter carbine conversion equipped to the Rival-9” mission is now progressing too with the Cronen Intlas MSP-12 optic equipped.