Bob Keller, a retired Master Sergeant, has more than two decades of experience in special operations of the U.S. Army. He has been part of elite units such as the 1st Ranger Battalion, 20th Special Forces Group, and U.S. Army Special Mission Unit. With over 1,000 real-world combat experiences, his expertise is highly valued. Currently, Bob is the founder and CEO of Gamut Resolutions, where he specializes in providing pistol and carbine courses that focus on target discrimination, tactical judgment, and precision shooting to save lives. His teaching methods are solely based on proven techniques.