DIY Barrel Rifling Tool Posted August 17, 2015 in Guns & Gear, Other Gear & Gadgets by Nicholas C with 18 CommentsTags: DIY, rifling, tools Hat tip to Bryan S. for sharing this with me. Here is a guy who made his own barrel rifling tool with some components he had lying around. It is rather clever how he does it. Here is the fruit of his labor.