its basic just like /rankstats just you push at button and it shows up on your screen above the crosshair
How To Use::
bind <key> "amx_killc YOUR-NAME"
then when you want to see your stats just push the key you binded it to
Heres What it should show...
[SWB] Stats |Kills:XX |Deaths:XX |HS:XX |Dmg:XX |Shots:XX |Hits:XX