M1 Machining is the first one to bring you a Universal Milling Jig that allows you to complete your custom AR15 and AR10 rifle builds. With careful engineering, we are able to save our customers money by purchasing a single Jig to complete their M1-80% AR10 and M1-80% AR15. We strive to create a user friendly shopping experience with everything you need for your custom rife build. M1 Machining would like to thank you for your support and for giving us the opportunity to earn your business. Thanks again and have fun with your custom rifle build!