Our custom made 5/16" solid carbide end mill is optimized for high speed precision milling of 80% lower receivers with a handheld router. The upper portion of the end mill is reduced to 1/4" to fit standard routers, while the shank and cutting surface are 5/16" diameter to allow for easier milling with minimal deflection.
This is the only end mill that will work properly with Easy Jig Gen 2. Using another type or size may cause damage to your lower and jig, voiding the warranty.
Made in USA