delzo has it right.
The products you by at walmart, are made to walmart specs.
You will not notice the difference at the initial purchase, but when you get it home and start to closely check it out, you will see the difference.
Companies that are willing to lower the standard of their products will always be around, so it is up to the consumer to educate himself so he knows what to look for.
Not ALL changes that are made will cause any real significant problems, but you should be aware of what they are.
If you buy a fishing reel from Cabela's, and it has steel parts on the inside and will last for several years of HARD fishing, you may give $100.00 for it.
You can go to Walmart and buy,what looks like the same reel, for $80.00.
When you get it home and take it apart for cleaning, you will notice that a lot of the parts have been replaced with plastic.
Either reel will cast and be smooth at first, but the plastic parts will wear much sooner and before long you will be looking to buy another one. Then that $20.00 won't seem so important.
It's easy to do at the factory. That really crisp trigger that is used, can be replaced with one that's not quite as crisp, but costs less to buy. The sights that can be adjusted easily, can be replaced with some that aren't quite as easy to adjust, but costs less to buy. That exceptional blueing that is put on, can be replaced with a little cheaper one, but costs a little less. And so on.
Like I said, not All changes will be an immediate problem, but over time, you may wish you had gone to a REPUTABLE local dealer, that will help you fix a problem if one comes up.