 The Nation's Gun Show this weekend at the Dulles Expo in Chantilly. 1,300 tables. Huge selection. Over two miles of guns, knives, and accessories. Get your guns while you still can. Expert dealers, concealed carry classes, seminars. The Nation's Gun Show at the Dulles Expo. Open Friday at 1 until 8. Saturday 9 to 5. Sunday 10 to 5. More info, advanced tickets, and coupons at thenationsgunshow.com.