Recently purchased a used Accuracy International AT folding stock. It's in great shape. Question is, When in the folded or extended position there is play in the folding mechanism. Not saying it's loose or wobbly but I've always heard that AI chassis lock up tight with no movement. Please advise if this is normal or if I should have it looked at. Since I've never owned a folder I look to the Hide for advice. Thanks in advance for your time.