Newest 43rd Edition with over 2,500 pages. Gun values are updated to reflect the volatile firearms market and changing trends in collecting, along with new 2022 models. Features over 17,000 manufacturers and 30,000 models. Updated 64-Page Color Photo Percentage Grading System (PPGS) has been revised, making firearms grading easier and more accurate. Includes serialization index charts to make finding serial number information quicker and easier.