C-Span will be running a two-part special on the NRA's National Firearms Museum as part of their American Artifacts series.
From the NRA Blog:
C-SPAN3 is airing an inside look of the NRA National Firearms Museum this Sunday, March 9, at 6:00pm. Part of the American Artifacts series, this two-part tour starts with the Robert Petersen Gallery and runs through the entire museum collection.American Artifacts airs on Sunday evenings at 6pm and 10pm with a live stream available at http://www.c-span.org/History/
"It's a pleasure to welcome the cameras of C-SPAN to the National Firearms Museum," said NRA Museums Director Jim Supica. "Sharing our exhibits with the general public is part of our mission and C-SPAN is a great venue for just that."
The show is available online on the Monday following the broadcast. Either way you watch it, this sounds like a worthwhile show.
A teaser of what will be shown is below.
UPDATE: You can see the recording of this show at this address at C-Span.