A Router Jig is an essential tool in the firearms industry, particularly for crafting lower receivers of AR-15 and AR-10 rifles. This precision instrument enables firearm enthusiasts and builders to mill out their lower receivers with unparalleled accuracy. It plays a critical role in ensuring that the components fit together seamlessly, resulting in a reliable and high-performance firearm. Whether you’re a seasoned gunsmith or a DIY enthusiast, a quality router jig is a must-have for your arsenal of firearm crafting tools.