Don't know about the guns / led stands, but as my 21" TV's width is exactly 59,6cm I'm going to build a cab that's 60 centimeters (23.62") wide... measured inside .. just add 2x16 millimeters (32mm = 1.26") to the overall (outside) width.. So, in the end the cab's width will be 63,2 centimeters (24,88")..