All of the noted Sako rifles above tend to come out the box lighter than the listed book weight, the Carbonlight would likely be no exception to this trend of Sako overestimating their Finnlight weights. My last Sako, the Black Bear, fell well under its factory listed weight as well.
Regardless, by the time you bond the action lug into an Edge, it will likely run somewhere within about 3-oz of the factory Sako version. The Carbonlight stock is markedly lighter, but I am unsure if Sako tweaks other dimensional details of the rifle in addition to bring down the overall weight.
For a M action, I'd expect the Edge to run around 27-oz with lug, and the soft touch to run around 30-oz. An S action should be a tad lighter on that scale. Something else to consider, though the Edge benchrest technology stocks are light and stiff, they are not particularly strong. This technology is designed like an egg shell and works wonderfully if kept within its strength limitations. It would be interesting to see some form of independent testing, but I would not be surprised if the standard Sako designed soft touch stock was proven to be tougher and more durable. Any difference in stiffness would likely be moot being the factory stock has proven itself more than ample for superb accuracy. Not sure how this later aerospace Carbonlight stock would fall within this balance of stiffness and strength compared with the other two stocks, but the Carbonlight does not appear like it would be fragile for its applications.
As noted previously, the techno lightweight mountain hunter who is a Sako fan and counts every ounce within his gear is likely the person who would look hard at this rifle. A Sako fan would likely stick with a Sako, especially now that a Sako techno lightweight mountain rifle is a viable option netting a marked weight reduction.
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