I golded out the Peacekeeper on Double Weapon XP weekend. Found that one remarkably easy, as I just played like I was using an assault rifle. Got my PDW done as well, and my Skorpion is close. The rest are on the way but still have to finish headshots on them.
Quick update... finished the Skorpion. Took everyone's advice and did the rest of my Cherry Blossom in conjunction with my Art of War. I found that using the Target Finder alleviated a lot of the stress of using that terrible weapon and helped me finish with some strong matches. Thanks for the help... and now... onto the ChiCom (GULP!)
Currently workin on scorpion. There are games where it feels like the 1st shot sails high due to recoil. Starting to get the hang of it tho. Diamonds when I am done with it.
Just finished Chicom and it was brutal. I play mainly HC and some games it would be ok but some games it refuses to kill in 1 pull of the trigger...ever. So I would generally get hit makers followed but instant death. Nothing more frustrating than finishing an HC TDM with 8 assists. There was a stretch of games where this gun would bring me 3 assists minimum.
Really did not play well with an any SMG other than PDW. Frustrating cause I was excited use them due to how many players dominate with them.
My suggestion for hardcore would be the laser sight. once you are used to it you don't need to ads and seems to nullify the recoil. With the scorpion extended mags can help because it uses so much ammo. On hardcore you can get several kill that way before reloading allowing you to make sure your safe before reloading. The hardest one for me was the chicom because my trigger finger sucks. Had to use select fire with that one.