Steve Acker. DVD format. You’re virtually looking over Acker’s shoulder as he performs each step and explains the how, what and why. Excellent instructional source that describes the process step-by-step; great for the beginner or seasoned professional. 4 hours, 10 minutes. Demonstrates advanced machining techniques used to true-up receivers, bolts, and barrels for precision competition rifles. Includes an in-depth discussion on the various components, state-of-the-art tools, and products available that save time and money.