@Canadian8tor : No, its easy, Just start a new world on survival and on peaceful mode and just create a Dispenser, To get achievement you have to be on survival even if you change it to creative once it will not give you any achievement after you set it on creative, Good Luck
I cannot get this achievement to pop, I've made dispensers in my game, friend's game and I get no achievement. it is starting to get frustrating. Is there something special that needs to be done? I heard from someone that you have to do certain things in a certain order?