Whether you are new to America s most popular rifle, or a longtime user who questions some of the wives' tales and urban myths surrounding the AR-15, gunsmith and author Patrick Sweeney lays out all the detail you need to select and maintain your rifle. From nomenclature to field-stripping, and keeping an AR functioning at its peak no matter how harsh the environment or demands, Sweeney gets under the hood with you to keep it running. It's all here, including: Terminology Essential Tools Disassembly & Cleaning Zeroing Troubleshooting And much more!.