Hmmmm.... the WZ131 has an 85mm and a 100mm Tier 8 to choose from. The 85 is one of those guns that shoots HEAT - 260 penn and 200 damage. The 100 does a best of 241 penn with 50 more damage. .36 vs .39 accuracy - in favor of the 85. To keep the 85mm and the 260 penn or to upgrade?