The Dead Air Muzzle Device Shim Kit provides a precise and reliable solution for timing your muzzle device. Featuring three different shim thicknesses, this kit ensures optimal alignment and performance for your firearm. Each shim is clearly marked for easy identification, and the packaging includes detailed instructions for proper use. Designed for simplicity, the thickest shim should always be placed on the barrel shoulder first, allowing for consistent and accurate muzzle device installation.