Brian,
I just weighed a Model #5-6" with nickel silver double hilt and Elforyn (Westy) handle and it weighed in, just under 10 ounces (call it 9 1/2). Then I weighed a Model #15 with nickel silver single hilt and black micarta border patrol handle at 12 ounces even! I definite difference!
Hope this helps, Capt. Chris