What Are the 'Common Sense Gun Laws' that Would Have Prevented the San Bernardino Massacre?

From PJ Media via H/T at Instapundit:

UPDATE: At a press conference that just concluded, law enforcement officials revealed that the two handguns were purchased by the shooters, but the long guns (the rifles) were not. So while the media will tell you the guns were purchased legally, they were not USED legally: this is called a "straw purchase" and it is illegal. We also learned that there were high -capacity magazine at the scene -- and hicapmags are also illegal in California. Additionally, law enforcement officials were not certain if the AR15 was California legal. So in other words, a bunch of existing gun laws were broken during this massacre. Remember that when President Obama and his motley crew of gun controllers demand even more firearms laws under the guise of preventing gun violence.

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It didn't take long for calls for gun control to start following the horrific massacre in San Bernardino by Syed Farook and his wife, Tashfeen Malik. The motive for the massacre has escaped our law enforcement officials as of this writing.

But "moments after the news broke of the shooting," Obama spoke to CBS News and called for "common sense gun safety laws" and also urged lawmakers to prevent people on the "No Fly List" from legally purchasing firearms. (As an aside, people on the No Fly List have not been adjudicated of anything, so that presents a whole range of civil liberty issues.)
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California has very restrictive firearms laws, probably the most restrictive in America. The laws are so restrictive that gun manufacturers have to make guns specifically for California. Many gun dealers or manufacturers just don't do business in California at all. It's a pain in the ass. Here's a great piece discussing the firearms laws in California by Brian Doherty at Reason.
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But when pressed for specificity about "common sense" restrictions on firearms, we don't hear much about a plan to stop gun violence. Following the California paradigm, where most assault-style weapons and high-capacity magazines are straight out illegal, what additional restrictions are we missing? A longer waiting period? Background checks that include more information? What kind of information other than criminal history should be included in a background check?

So really? What's the plan? You know, the "common sense" one that doesn't involve a total ban on firearms?

Waiting ...............