I had my ar apart the other day, and noticed that the gas tube was a bit loose?

Right where the tube goes into the upper reciever, (and where it mates to the gas key) I can take my finger and wiggle it around about 1mm (maybe a little less). It doesnt interfere with operation of the gun at all, thebolt still goes into battery, and the gas key still mates to the tube fine, I was just wondering if it may cause a problem later down the road?

any input helps.

Thanks,
Kenny