That said, using a low mass buffer, carrier and the lightest components you can find, 5.6-6 pounds is gonna be it. I'm a fan of light weight barrels and light weight guns but 7 pounds scoped is about as low and you're gonna get.
Pardon the thread drift but I have to add that the above being an established fact, makes a SCAR 17S's 7.9# weight all the more phenomenal. Add a pound or so for a LW scope and rings of course.
