Like Taking an Armorer's Course for the AR-15 In this companion volume to Gunsmithing the AR-15 Volumes 1 and 2, gunsmith and best-selling firearms author Patrick Sweeney goes beyond basic repair and maintenance and provides project instructions and expert tips to install some of the most popular brand components, including parts from: Geissele Daniel Defense Yankee Hill Alexander Arms Timney Rock River CMC Wilson Combat And more...