Printing an AR-15 lower receiver was something I wanted to try when I bought my first printer. But trying to find files early 2020 proved to be difficult. The only design I could find was Drsails lower on Pinshape.com. After downloading his files I soon found that they where not dimensionally accurate, so I decided to design from scratch. One feature of Drsails lower I borrowed was the print orientation. Printing at a forty five degree angle allows for almost no support material to be used, which was very attractive to me at the time.