This stock is a McMillan RMR built with their Edge technology. It weighs 24 ounces on my digital postal scale. It's inletted for a Stiller Predator LA, Rem. factory BDL bottom metal, and a Rock #4 barrel contour. Stainless studs. I believe it will also work with Stillers TAC300 action, but I'd check with them first. $425 shipped insured to the lower 48.