There are substantial state imposed cost and regulatory requirements that manufacturers must submit to in order to be permitted to market their firearms in this state. Many manufacturers simply choose not to sell here because of that. The state in fact applies it's ridiculous safety standards to force firearm manufacturers to design to their requirements, then requires them to pay to apply to get on the "roster" to sell in the state. It is in fact a form of extortion.
I am not convinced that fewer sales is good thing. There is more than just the selling of firearms. There are stores and shops that employ salespeople and stock people. Truck drivers that deliver firearms and ammunition. Clubs and ranges that employ people and generate jobs. This is all intimately link to the market.
From the "a less armed society is a safer society" perspective, I might be tempted to agree, however you hand criminals and bad guys a green light when you completely disarm society. It is the proverbial double edged sword. If you don't provide a large and omnipresent police force (read increased taxes and municipal infrastructure) you must allow individuals to protect themselves. You must also allow certain sporting and recreational activities to exist.
I look at Vermont, one of our neighboring states. It has one of the lowest firearm crime and death rates in the country, but also has some of the least regulatory firearm laws.
http://gunowners.org/vtcarry.htm
http://flowingdata.com/2011/01/19/states-with-the-most-and-least-firearms-murders/