M1 Machining strives to create a user friendly shopping experience for custom AR15 2.23/5.56 builds. This is great place for a weapon enthusiast and a true “Do-It-Yourselfer” to get ideas and find the right parts to complete a rifle build as unique as its owner. M1 Machining manufactures the M1-80% AR15 Lower Receivers, and we have networked with various vendors to provide a complete solution for anyone to confidently complete an AR15 2.23/5.56 rifle. 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!