Info:
Human Sergeant's minigun - this is custom model minigun for Team Fortress Classic look like a Human Sergeant's minigun from Half-Life Beta. For more read this http://half-life.wikia.com/wiki/Human_Sergeant
Credits:
This model based on hassault.mdl from Half life Beta replacement pack which can be found here http://www.moddb.com/games/half-life/addons/zelaroth1
Known bugs:
Also, there is no model p_mini.mdl, because it looks ugly, maybe later I will make this.
