Answer

+1
Answer
Answered
Already bought/unlocked alterations won't disappear when you get next modification of a turret.
For more information about alterations, check this: http://en.tankiwiki.com/Alterations

+1
Once you unlock an Alteration by purchasing a certain modification of a turret, you'll see it in garage.

i dont understand... i have m2 fire and i want to buy it's alteration ... .... but will the alteration stay when i buy m3 fire??
Customer support service by UserEcho
Already bought/unlocked alterations won't disappear when you get next modification of a turret.
For more information about alterations, check this: http://en.tankiwiki.com/Alterations