Our NEW MJOLNIR grips are CNC machined on our high-tech equipment in our facility in Allendale, Michigan. We painstakingly craft these from solid billets of high-quality copper, brass or aluminum. The unique material selection and geometry provide for an ergonomic grip with a unique look unparalleled by anyone else in the industry. Copper weighs 15oz and brass weighs 14oz which especially helps with reducing recoil and balancing barrel-heavy firearms. Aluminum weighs just under 6oz, for those looking for a lower weight option. Has a beautiful machined texture that simulates the effect of stippling on polymer components.