Slavage gave good advice. Here's a different twist if the dealer is a jerk. Tell the seller that you want an upgrade to a Ruger & if he won't, threaten him with a small claims court action against him for the cost of the gun, small claims court fees, sheriff's service, etc. By the time it's over, he'll have around $300. in extra costs.
I believe that since he sold you an item that won't do what it's advertised to do, and if he refuses to give you an item that does work as advertised, you will win the suit, and the court will order him to pay the fees.
This is your last resort course of action, only if the dealer is uncooperative. Most want to have satisfied customers.
Probably the smartest thing you can do is GET THE RUGER.