CSO' Skull-5

There are 6 weapon in Skull WPN[CSO]that i know

there are :

1.Skull-1[Handgun]

2.Skull-3[SMG]

3.Skull-5[Auto Sniper Rifle]

4.Skull-7[Machine Gun]

5.Skull-9[Melee]

6.Skull-11 [Auto Shotgun]

and, sorry for bad English