Description
Sniper Rifle Model 7.62mm M40A3 TM 05539D-10-1 Technical Manual
New re-print restored and digitally enhanced from a nice original. Printed on high quality 20# 97 bright acid free paper. Fully Illustrated.
We are not affiliated with any arms or gun manufacturer.
This U.S. Marine Corps technical manual provides detailed instruction for the 7.62mm Sniper Rifle M40A3, covering operation, function, maintenance, and inspection procedures for armorers and trained personnel. It includes mechanical principles, field and sustainment maintenance guidance, troubleshooting steps, and parts information for keeping the M40A3 in proper working condition.
Historical Note
The M40A3 is one of the later evolutions of the Marine Corps’ long-serving M40 sniper system. Used extensively in the early 2000s, the A3 variant features upgraded ergonomics, improved barrel and stock design, and enhanced reliability for precision shooting. This manual represents the instruction given to Marine Corps personnel responsible for maintaining this rifle during its service life.
This reprint is ideal for collectors, historians, armorers, and anyone researching modern Marine Corps sniper systems. It provides clear reference material for the M40A3 platform, including its action, stock hardware, sighting components, and maintenance standards. Useful for understanding the evolution of the M40 series and for comparing A3 features with earlier and later variants used by the USMC.
CONTENTS INCLUDE:
- General operating information
- Equipment data and specifications
- Rifle assembly and component identification
- Principles of operation
- Field and sustainment maintenance procedures
- Troubleshooting and corrective actions
- Parts and support information
- Index

