For those who want to warm up before a game or sneak in some general practice and surprise everyone with your mad new skills - I recommend you subscribe to these maps

Recoil Master
This map teaches you recoil patterns and shows you how to handle them to get you aim on target even when you spamming.
http://v1.steam.hlxgame.cc/sharedfiles/filedetails/?id=419404847

Fast Aim & Reflex
as you may have guessed, this will improve you general aiming skill and speed with a variety of modes to get those moving target headshots and more.
http://v1.steam.hlxgame.cc/sharedfiles/filedetails/?id=647772108
Snap Shooting
http://v1.steam.hlxgame.cc/sharedfiles/filedetails/?id=241148414

Active Duty Nades
These maps are awesome if you looking to place you nades in the most effective spot which benefits your entire team!
Dust II: http://v1.steam.hlxgame.cc/sharedfiles/filedetails/?id=707984520
Mirage: http://v1.steam.hlxgame.cc/sharedfiles/filedetails/?id=496123922
Inferno: https://v1.steam.hlxgame.cc/sharedfiles/filedetails/?id=464056316

Crosshair
As you prabably know, the default crosshair is ♥♥♥♥♥. Why not create your own or choose from one of the pro's to find the hair style that lets you own the most!
http://v1.steam.hlxgame.cc/sharedfiles/filedetails/?id=308490450


There are pleanty more out there and we will update this as we find more maps that work for us