It's suppose to have play. That's how the anti recoil system works. I have heard of people using epoxy to glue it together and later found out they could not get the action out of the gun. If you feel that it has to much play take the action out and make sure you have not broken the springs on the slide.
I have the mod 25 tactical and the mod 25 that the OP is referring too, the recoil sled really does make the gun more accurate .
Sorry no accuracy reports on that mod but I would guess that the accuracy was shotgun patterns as this gun has massive recoil. The slide really does a good job.