Tbh the Pansarvarnsgevar 90 is extremely underpowered in this game. It's a bloody .50 Cal, even the 1 star version should rip nearly every robot in the game in half on direct hit
I my opinion PVG is overpowered in this game against tanks and high armored targets. A few shots and the tanks i destroyed. This is pure fictional. Try to imagine destroying a tank in real life with a AG 4 or a AK 47 just by shooting over an over at it.
Be lever 25 and destroy rivals, or do base assault/defense. You can go for the reaper tho at any level but it's easier to go for fnix base assault honestly