In a discussion about gun control, host David Gregory brandished a 30-round magazine purportedly for an AR-15 or similar "assault rifle."  The discussion took place on December 23, during the broadcast of NBC's Sunday morning political talk show.

Washington D.C.’s gun laws, however, state that even possessing such a device is a violation. Meet the Press is filmed at NBC's D.C. studios.

The law in question is titled: DC High Capacity Ammunition Magazines – D.C. Official Code 7-2506.01, and reads (my bold):

(b) No person in the District shall possess, sell, or transfer any large capacity ammunition feeding device regardless of whether the device is attached to a firearm. For the purposes of this subsection, the term large capacity ammunition feeding device means a magazine, belt, drum, feed strip, or similar device that has a capacity of, or that can be readily restored or converted to accept, more than 10 rounds of ammunition. The term large capacity ammunition feeding device shall not include an attached tubular device designed to accept, and capable of operating only with, .22 caliber rimfire ammunition.