Problem in animation transition

Hello;

i have a problem

im trying to do an animation using state machine,you can see the screen shot

right mouse button make a degain pose

from : Idle/Run/Sprint to BS_AnimPistolWalkRun that’s work fine(right mouse button still pressed for transition and vice versa)
from : Idle/Run/Sprin to pistolidle that’s work fine(right mouse button still pressed for transition and vice versa)
but from BS_AnimPistolWalkRun to PistolIdle there a problem,i want ,when i stop runing character stay degain but there a very small animation between those 2 poses

please to see the video in link for better understanding : /watch?v=cmpqFUl7SFE

can some one help plz?!

thx in advance