Our Patent Pending 5/16" end mill has been thoroughly optimized for milling aluminum 80% lower receivers with a handheld router. The upper portion of the end mill, the collet area of the shank, is reduced to 1/4" diameter to allow for use with compact routers which are commonly equipped with a 1/4" collet size. The remaining length of the end mill, including the cutting surface, is 5/16". 5D Tactical is the only jig manufacturer to offer a custom designed, oversized end mill for this purpose.
Through our extensive testing, we determined that the 1/4" diameter end mills offered by other jig manufactures are not optimized for their intended use, leading to slower milling, constant chattering, inconsistent finish quality, and frequent tool breakage. For more in-depth information, please read our 5/16" Hybrid End Mill Analysis which outlines in great detail the performance benefits of our end mill design.
Every facet of our end mill design was considered and refined during an extensive prototyping and testing phase. From the proprietary material makeup, to the design of the cutting surface and flutes, we achieved optimal performance and maximum tool durability. In conjunction with our Universal Router Adapter, the end mill remains supported by a bearing in all directions at all times, further reducing end mill flex and the opportunity for premature tool breakage.
Please Note: 5D Tactical AR-15 and AR-308 Router Jigs require the use of our custom end mill. This end mill is custom designed and manufactured for 5D Tactical, and is not available for sale elsewhere by any tooling supplier or manufacturer.
