He said murders by people using guns.  There were 9,616 murders committed with firearms in 2015 according to the FBI.  Which is a lower number than 10,265 deaths due to DUIs.  So he is correct.

Your figure of 30,000 is all firearm-related deaths (suicides, homicides, accidents).  If you're going to use all firearm-related deaths, then you should compare it to all alcohol-related deaths.  According to the CDC, there are an average of 88,000 alcohol-related deaths each year.