Lots of wobble in this stock - Strike Industries MOD-1 AR Collapsible Buttstock

Read many reviews for this particular stock before I purchased. Nearly all the reviews I read were positive, and stated the stock had a good tight fit to the buffer tube. I received the first stock from Optics Planet and also purchased a Strike Industries seven position buffer tube with it. The buffer tube measured correctly at the Mil-Spec Ø1.148" However, with the stock assembled on the buffer tube and fully extended, it had 3/16" to 1/4" rocking play or wobble at the buttstock end. This is worse than I have seen on many run of the mill Mil-Spec stocks. I contacted Strike Industries about this asking if this is normal for this stock, and they just gave me an RMA to return for a replacement. I therefore assumed that this was not normal. However, when I received the replacement stock it was just as bad, if not a little worse. They should have told me this is normal so I could have saved paying the shipping charges to return it to them. The stock is very nice otherwise, it is comfortable to shoulder, and is great in function as a minimalist stock.