Smooth Position Change (Ironsights)

I have the positions for the gun model stored in the script for my weapon for when it goes into ironsights. I've been able to make the gun sway by doing so by using the rotation commands and have it smoothly rotate, but I was wondering if there was a way to smoothly move the weapon from one set of x,y,z to another x,y,z. I have the positions as GunX,GunY and GunZ and the Ironsights positions as ZoomX,ZoomY and ZoomZ.

So my point is, how would I be able to get it to move from one to the other smoothly?