You will enjoy the Museum very much if you like firearms and history. It is about special made, historical firearms. There are no modern military
weapons on display. A lot of donated high quality, custom made firearms from the "PETERSEN PUBLISHER" owner. Plan on spending a good half day
viewing. There is a on site restaurant.
I enjoyed the museum very much two years ago.
If you like aviation, there is also the air museum close by near Dulles Airport.
The National Air and Space Museum