Nice work. I wasn't going to go for it but I'm a bit tempted. Been getting the guns in gold but haven't bothered with platinum yet. I only get a few hours in on the weekend so it's unlikely I'll get it done. 2 snipers, all the SMGs, all the Marksman rifles and 3 assault rifles are gold so far.
The camo grind is so much easier in MW2 than MW2019. I remember it taking so long on MW2019, so I've decided to slow down on going for Orion (i.e. stop playing Shipment) otherwise I'll be out of challenges to do so earlier in the game's lifespan. I'm not sure I can be bothered to go for the Mastery Charms, they look a bit rubbish...but never say never!
I really wish there was more to do for people who play MP more regularly. I maxed the prestige level and battlepass ages ago, which makes getting any XP completely worthless at the moment. Season 2 is still weeks away!