The easiest way to get great armor or weapons is to drug farm. There are two different kinds of drug seeds in gangwars, which are Cannabis and Poppy seeds, both grow at the same speed and require the same amount of effort only the product is different and reward is different.
You get armor blueprints from cannabis and weapon from poppy.
Growing the seeds may take a few minutes as you may imagine. So make sure you have a well gaurded base.
Edited by Strk9