The GRS Bifrost Cheekpiece Spacer is a precision-molded 15mm riser designed to provide additional height for the cheekpiece on the GRS Bifrost and Fenris stock series. This accessory is essential for shooters using high-profile optics or large objective lenses who need to achieve perfect eye-to-optic alignment beyond the standard adjustment range. Made from the same rugged, glass-fiber reinforced composite as the stocks themselves, the spacer maintains a seamless aesthetic and rock-solid stability. It installs easily between the stock body and the adjustable cheek rest, ensuring a comfortable and consistent head position for improved long-range accuracy.