anyone know the weight on this guy? I am assuming its the lightest one they make. I have a 13 ounce DD free float rail on one of my guns now and am looking for a lighter rail.

Found this on ar15.com:

13� VTAC ALPHA:
�Weight w/clamp: 13.36 oz.
�Exact Length: 13.1�
�Number of rail slots: 33
�Inner diameter: 1.37�
�Outer diameter: 1.75�
�Length of cooling hole: 1.5�
�Number of cooling holes: 39
�Gas tube channel diameter: .5�
�Inner diameter of barrel nut: 1.05�
�Material: 6061 T6 Aluminum
�Coating type: MIL-A-8625 TYPE III CLASS 2 HARD COAT ANODIZED w/Teflon

Check out the Rainier Arms Evolution. Its 12.37" long, uses a standard barrel nut (with heatsinks), and weighs only 11 oz.

http://www.rainierarms.com/?page=shop/detail&product_id=2563

The VTAC version weighs more than the standard Alpha rail. I just put one on with the built in front sight, very nice and weighs less than the 7" LaRue I replaced.

Best I can find is 11.43oz and that includes a standard barrel nut but no additional rails.