I have A Saginaw M1 carbine, had it for decades; haven't fired it for long time, until now. I noticed something that I either never noticed before or long ago forgot. You can grasp the barrel and pull the action front and back, just a wee bit but enough to hear the 'bump bump' of movement. The recoil plate is down tight and when the action is against it it is flush to the eye but you can see the movement as the action is pulled front away from the recoil plate. It doesn't affect function or anything.. Is there a problem here or this one of the M1s little 'normal' oddities? The stock is typical military tho rather nice and solid.