It may seam counter intuitive, but adding a heavier stock will shift weight. I'm not talking a.PRS or anything, just a couple ounces. Basically adding back some of the weight saved by a lighter handguard, only to the back of the gun. Switch to polymer BUIS, move your optic to the rearmost position that you can work with, extend your buttstock a notch or two.
A major item is to check your technique. Moving your support hand as far forward as possible will put more of the weight of the rifle between your hands, causing it seem lighter(each hand is holding more equal weights). This also gives you more control over the muzzle, making the front seem lighter, less pendulous.
Remember these are just tips and techniques to make the most of what you got, the expensive bits anyways, and doesn't actually make the gun lighter. Just a bit less nose heavy and a bit more maneuverable.