I have a couple Sambar stag AG 110s and both have no such blade play problems. One did have an exposed blade tip when closed, but the warranty department fixed that and it's now one of my favorite knives.
The AG 110s are great if you are an a budget. They are just a good a knife functionally as a custom and some are very beautiful, but be aware that the specific selection of stag on the custom is likely to be nicer. I think there is a bit more individual attention given to the customs. At least this rings true from my experience.
I imagine if you got an AG 110 with a blade play problem the warranty department would honor it and make good on it. I wouldn't let that prevent me from owning a fine knife.
Another plus for the Cabelas AG 110s is that Buck will sharpen them for free. You just pay the postage to Buck.