The Ultimate Jig® is the only jig on the market designed to work seamlessly with AR-15, DPMS/LR-308, and 9mm Glock or Colt-style AR lowers, eliminating the need for separate jigs for different calibers. Built from heavy-duty steel with reinforced key components, this jig is engineered for durability, allowing you to complete multiple 80% lower receivers without the need for replacement parts. Using common household tools, you can mill your lower receivers with precision and convenience right at home. An added LED light feature enhances visibility, making the milling process even easier and more efficient. With the Ultimate Jig®, you’ve invested in a reliable, all-in-one solution for your firearm builds.