critical hit is awesome and i personally think the critical hit ratio goes up the more you modify, but other than the critical s its pretty low on damage if your fighting vikings and mammoths but thunder surpasses smoky at the m3 modification so i would personally go for thunder but its your choice :D

definitely worth M3, if you think about it m3 thunder is one other the cheapest 3rd modification gun in the game i would say go for it if you want to own the wasps hornets viking and hunter

I don't think ricochet is under powered it actually one of the most dangerous guns in the game the problem is how many shots u can shoot before it runs out (about 10-11 bullets) and if your versing a spam gun like twins then your done for that probably why people use twins more then rico