Quote Originally Posted by QXZ View Post
ya i m upping my SSR wpn and it seems like the chance is 17% or you need 6 x R for 100% to up from lv 3 to lv 4
The good thing is that u always see a confirmation with the chance displayed, so you won't waste any R weapon.
If you like risky, you could upgrade at 75%+ , but SSR weapon seems to have a higher fail rate than displayed. (Only feeling, Not enough data to confirm this.)
You won't be able using Rs upgrading ssr to 20 at 100%, because the max amount of fodders is 20. Then you will need sr as fodder.