When I swapped out the walnut on my GST, I weighed the pcs on a kitchen scale. Not the most precise instrument but a little comparison.
Stock:
Wood - 1lb 7.5oz
Laminate - 1lb 3oz
(note: laminate stock was also about 3/4 longer in LOP)
Forearm:
Wood - 5.5oz
Laminate - 6.5oz
Stock:
Wood - 1lb 7.5oz
Laminate - 1lb 3oz
(note: laminate stock was also about 3/4 longer in LOP)
Forearm:
Wood - 5.5oz
Laminate - 6.5oz