We still need more weapon based achievements, with Agent, Secret Agent, and 00 Agent.
The ones we lack are Slappers, Hunting Knife, Throwing Knife, DD44 Dostovei, Cougar Magnum, ZMG, D5K Deutsche, Shotgun, Auto Shotgun, Grenade Launcher, Grenade, Golden Gun, and Tazer Boy.
Some suggestions for names could be:
"Pinball" - Grenade Launcher (considering how it bounces)
"Don't Taze me Bro" - Tazer boy
"Knife Juggling" - Throwing Knives
"Meet the Wild Life" - Hunting Knife
Also, achievements for the DD44 could start at 44 kills, and the Cougar Magnum could have one at 357.