This newest Blue Book Pocket Guide for Colt Firearms & Values features the following: Convenient 4¼ x 7 in. size makes it the most portable and easy to use book on Colt firearms ever published! At 160 pages, this new Blue Book pocket guide lists and describes practically every Colt firearm manufactured. All the new 2013 Colt models have been included Values have been updated and reflect current market conditions Includes both How to Use and Grading Criteria sections