Its a JAE 700. Made by JAllen Inc. they are pretty sweet with a lot of customizable options as far as color and accesories for them. Ive never shot one but have one on order since last sept and it was a 10-12 month wait then. I have felt one at surgeons place without a ba in it and its seems to be a pretty comfortable stock.
From handling it, it seemed comparable to a manners t2a or t4a or mcmillan a5 standard fill. Their website says depending on accessories, range 4.5 to 6 lbs.
A little heavy, but nice stocks. Mine fit the action like a glove and pretty much everything is adjustable. It was a long wait (I was in the first run, so I waited four years) but well worth it...