The way I did it was on the map propaganda to rush point E as china on conquest at the start of the map pick up the RAWR which is in a box in the large building north of E (You will see it on your map as a box with a star on it). Deploy it straight away and head for C as its the start of the match there are plenty of people that can be picked off.
Also the kills do not need to all be done with one bot as along as all 5 are in one round.
Here are some other locations that I have found where you can find the RAWR on conquest.
Propaganda:- Flag A next to the container
Sunken dragon:- Just northwest of the flag C between a tall building and small hut
Lumphini Gradens:- West of flag B round the side of a white house with wooden decking
Pearl Market:- In a ground floor building just south of flag E
The RAWR handles like an EOD bot and is equiped with a LMG and a grenade launcher. I personally found it quite hard to move around so some people may prefer to camp out the kills.
If anyone one knows of any other locations please add them in the comments cheers.