October 2012 printing. Marine Corps Reference Publication 3-01A, Rifle Marksmanship, presents how the Service rifle/carbine is employed by the individual Marine, contains the skills and techniques required for individual rifle marksmanship, and provides the skills that are required for basic through advanced marksmanship. This publication is intended to be used as a reference guide concerning marksmanship skills for unit commanders, trainers, and individual Marines. It presents marksmanship techniques organized by topic, and within each of those topics, techniques are broken down further as they apply to employment with the rifle combat optic (the primary sighting system) and with backup iron sights.