Hikermor,
I have one and it weighted in about 14 lbs without the radio and accessory pouches, so 17 is probably close with all attachments.
They are designed by Arc'Teryx, and built by Propper. They are actually very nice packs except for the weight. Weight is due to the heavy cordura used and all the Molle webbing. They are not fragile, to say the least.
If you strap the Assault pack on the back of the main pack it is even heavier. You can get the ILBE packs on ebay for pretty good prices if you are willing to carry the weight.
I switched to an Eberlestock pack that is similar in design but uses much lighter materials and only weighs about 7 lbs, which is about the same as a large ALICE.
Gotta love hand-held digital travel scales.
Greg