This US Army FM 23-27 Mk 19 40-MM Grenade Machine Gun book is a must-have for any militaria collector. With detailed instructions and specifications for the Mod 3 version, this original piece is a valuable addition to your collection. This book is perfect for anyone looking to learn more about the Mk 19 40-MM Grenade Machine Gun Mod 3 or for those who want to add a unique and authentic piece of militaria to their collection. Whether you are a seasoned collector or just starting out, this manual is sure to impress.