http://www.samharris.org/blog/item/the-riddle-of-the-gun
http://www.samharris.org/blog/item/faq-on-violence
I think his views are influenced in part by the death threats he has received due to his past writings & work. Nevertheless I agree that more can be done to keep guns out of the hands of nuts, and perhaps out of the homes of people who have nuts living there.
My past comments on the issue are here:
http://jonathanshome.blogspot.com/2012/12/comments-on-gun-control-december-17-2012.html
As for Sam Harris, it's worth making note of people who receive threats from Islamists for speaking their mind:
http://en.wikipedia.org/wiki/Theo_van_Gogh_%28film_director%29
http://en.wikipedia.org/wiki/Ayan_Hirsi_Ali
The film Theo Van Gogh was killed over:
http://en.wikipedia.org/wiki/Salman_Rushdie
Death threats do tend to sharpen the mind I'm sure. All these people tend to be hawks when it comes to Islam, and for good reason - because they have first hand experience with what happens when we encounter a medieval cult still with wide reaching power over people.
More on 9/11 liberals: