I haven't weighed the gun so I cannot tell you an exact number. However, I can tell you that it is a lot lighter than the Benelli Nova I am used to carrying around during turkey season.
I bought all the pieces for the gun, minus the stock, from Stonewall Creek Outfitters for around $520 shipped to the door. My friend who built the gun, had a piece of wood for the stock and he charged me $150 to carve the stock and put the gun together.
I finally patterned it a bit this past weekend with good results. At 30 yards, I was easily peppering a turkey head target. I shot 80 grains FF, 1 OP card, 1/4" wad, 1 3/8 oz #6 shot and 1 OS card. Taking a fine bead, the gun shoots a little low so I need to file the front sight down some.