I have two Kimber .308's on opposite ends of their spectrum..
I have a Mountain Ascent .308 which is now their lightest gun which is a tad bit over 4lbs and comes with lightweight rings. Coupled with a 8oz Leupold scope and I have the easiest rifle to carry in the woods. It shoots great, but after a few on the range your shoulder may be a little sore.
Someone else stated it, Kimbers as well as any other ultra light rifle take time for people to learn to shoot. I have sold Kimber rifles for years, the only complains I ever had were a few guys saying they couldn't get consistent groups. I sent the rifles back to Kimber for the customers and they were returned with test targets with .5-.7inch groups.
My other Kimber .308 is their 8400 Advanced Tactical, and it is HEAVY, but a tack driver.