Our custom made 5/16" solid carbide end mill bit is optimized for high speed precision milling of 80% lower receivers with a handheld router. The upper portion of the end milling bit 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 product is also proudly made in USA.
NOTE: This is the only 5/16" high speed 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.
Removing material too quickly can result in a poor surface finish or a broken end mill. For best finish results, and long tool life, set the router to its maximum speed and take your time by moving slowly and making shallow passes.
