The pistol animation of the right hand pistol is not animating the pistol sled like the left hand. This happen on my setup and in the demo scene. Here a small video:
Thanks for letting me know. The right handed pistol was actually correct, and the left hand pistol was playing the fire animation when it should have been playing the dry fire animation. You can fix this by changing the Slot1ItemSubstateIndex to Equals 2 condition in the transition to fire for the left handed pistol: