The M40 is a sniper rifle used by the United States Marine Corps. It has had three variants â€” the M40, the M40A1 and the M40A3. The M40 was introduced in 1966. The changeover to the A1 model was completed in the 1970s, and the A3 in the 2000s. The A3 model costs $3,200.
Each weapon begins life as a Remington 700, and is then extensively modified by hand by USMC armorers at Marine Corps Base Quantico, using components from a number of suppliers. New M40A3s are being built, and A1s are upgraded to A3s as they rotate into the armory for service and repair. The rifles have had many sub-variations in telescopic sights, and smaller user modifications.
The original M40 was a military type-classified version of the Remington 700; it was factory-made, and had a one-piece wooden stock. The M40A1 and A3 switched to fiberglass, with new scopes added as well. The scope itself costs $1000.
During the Vietnam War, the Marine Corps decided they needed a standard sniper rifle. After testing several possibilities, they ordered 700 Remington Model 40x rifles (target/varmint version of the Model 700 bolt-action rifle), and gave them the M40 designation. Most had a Redfield  3â€“9 power Accurange variable scope mounted. With time, certain weaknesses, primarily warping of the all-wood stock, became apparent. Sometime in the early 1970s, the USMC armorers at MCB Quantico began rebuilding the original M40s into M40A1s. The process involved, among other improvements, replacing the original wood stocks with McMillan A1 fiberglass stocks, as well as replacing the original Redfield scopes with Unertl  scopes.
In 1996 the USMC started on the design for the replacement of the M40A1, the result was the M40A3. It uses a Remington 700 short action, with a steel floorplate assembly and trigger guard built by D.D. Ross. The Unertl rings and bases have been replaced with D.D. Ross base and BADGER ORDNANCE Machine rings. The rifles also come with a Harris bipod and an accessory rail, built by G&G Machine. The stock is a new McMillan A4, with adjustable cheek and length of pull.
As the M40A1's rotate in for service and repair, they are replaced by M40A3's. All M40A3s are built by USMC Armorers at Quantico Virginia. The M40A3 is an outstanding replacement for the aging M40A1's. The rifles are extremely accurate, very rugged, and are designed from the ground up to be a superb sniper rifle. Combined with the new M118LR ammo, it makes a system that is ranked with the best in the world.
Scout Sniper School
1. COURSE SEATS:
A. COURSE DATES PER THE DIVISION SCHOOLS TEEP
B. MAXIMUM COURSE SIZE: 25
C. LOCATION: BLDG 33427
D. CHECK IN: 0730
E. NOMINATIONS ARE DUE 1 MONTH PRIOR TO COURSE.
F. NEGATIVE RESPONSE IS REQUIRED.
2. COURSE PREREQUISITES:
A. PFC-GYSGT WITH THE O3XX MOS
B. 1 YEAR ACTIVE DUTY REMAINING UPON COMPLETION.
C. DEPLOYABLE WITH UNIT
D. WILL BE REQUIRED SCORE A 1ST CLASS ON PFT DURING CHECK-IN
E. NO NJP IN THE PAST 6 MONTHS
F. NO DRUG OFFENSES
I. CURRENT EXPERT WITH M16A2 SERVICE RIFLE.
J. STUDENTS FREE OF ALL MEDICAL, DENTAL, AND PERSONAL PROBLEMS.
K. STUDENTS SUBJECT TO URINALYSIS TESTING.
L. NORMAL COLOR VISION, CORRECTABLE TO 20/20
M. 2ND CLASS SWIMMER
3. ADMINISTRATIVE REQUIREMENTS:
A. UNITS ISSUE NON-FUNDED TAD ORDERS DIRECTING STUDENTS TO REPORT TO DIRECTOR, DIVISION SCHOOLS, 1ST MARDIV FOR DUTY.
B. STUDENTS MUST REPORT W/FOLLOWING:
1. ORIGINAL ORDERS
2. SRB (OFF BASE UNITS ONLY)
3. MEDICAL RECORDS
4. COPY OF CURRENT ITR/BTR/RED
5. MEAL CARD, COMRATS OR TAD RATS
4. PERSONNEL AND LOGISTICS SUPPORT REQUIREMENTS:
A. CURRENT PRE-FIRE INSPECTION AND LIMITED TECHNICAL INSPECTION PAPERWORK FOR ALL WEAPONS PLUS 1 EXTRA COPY FOR RECORD
B. 1 PRC-119 (SL/3 COMPLETE) W/10 BATTERIES PER 2 STUDENTS
D. WEATHER PROOFING GEAR
E. 50 MRE’S PER STUDENT
5. MINIMUM CLOTHING/EQUIPMENT:
A. 1 M40-A1 SNIPER RIFLE SL-3 COMPLETE
B. 1 M49 SPOTTING SCOPE SL-3 COMPLETE
C. 1 PAIR 7X50 BINOS W/MIL SCALE
D. 1 E-TOOL W/CARRIER
E. 1 LENSATIC COMPASS
F. 1 PONCHO W/LINER
G. 1 LBV OR CARTRIDGE BELT W/H-HARNESS
H. 1 CAMMIE PACK OR STICKS (ASSORTED COLORS)
I. 1 MEAL CARD (IF APPLICABLE)
J. 4 CANTEENS W/COVERS AND A 2 QUART (4 QUART CAPACITY)
K. 1 COMPLETE GHILLIE SUIT
L. 1 SAND BAG
M. 1 FIRST AID KIT
N. 1 SLEEPING BAG W/COVER
0. 1 SET LINEN W/A GREEN BLANKETS & PILLOW
P. 1 FLASHLIGHT W/EXTRA BATTERIES
Q. HEARING PROTECTION
R. 1 ALICE PACK WITH FRAME/MOUNTAIN RUCK PREFERRED
5. 1 FIELD PROTECTIVE MASK
T. 1 PROTRACTOR
U. 3 SETS CAMMIE UTILITIES
V. 2 SETS OF BOOTS
W. 1 SET MAP PENS/GREASE PENCILS
X. ACETIATE/lO SHEETS (8 1/2X11)
Y. 1 CALCULATOR
Z. 1 WHISTLE
Scout Sniper School
AA. 3 RING BINDER WITH PAPER
BB. 2 LOCKS
CC. 1 SET ID TAGS
DD. 1 CAMEL HAIR BRUSH
EE. 1 BOTTLE AUTH BORE CLEANER
FF. 2 DRY CLOTHS
GG. 450 (7.62) AND 200 (5.56) CLEANING PATCHES
HH. 1 USMC SCOUT/SNIPER DATA BOOK (NAVMAC 11050) SCHOOL DOES NOT PROVIDE
II. PT GEAR (GREEN SHORTS, GREEN T-SHIRT AND RUNNING SHOES) GRAY OR GREEN SWEAT SHIRT
JJ. 1 SET OF MAPS: 1 OF EA. MARGARITA PEAK, SAN CLEMENTE, AND A CAMP PENDLETON SPECIAL
KK. HELMET (COMPLETE)
LL. 1 M16A2 WITH 3 MAGS INCLUDING A POUCH AND BFA PER 2 STUDENTS
MM. 1 M9 WITH HOLSTER, 2 MAGS AND 1 MAG POUCH
NN. BUSH COVER
00. TERRAIN MODEL KIT
PP. FLACK JACKET
6. STUDENTS WHO REPORT WITHOUT REQUIRED WEAPONS AND EQUIPMENT WILL BE RETURNED TO PARENT UNIT.
7. DIRECT LINE BETWEEN UNIT AND COURSE NCOIC AT EXT: 5-8975 IS ENCOURAGED
8. ALL COMMANDERS AND PLT SGT’S ARE WELCOME TO SIT IN ON ANY PORTION OF CLASSROOM INSTRUCTION WITH PRIOR COORDINATION.
9. THE SCHOOL AT THIS TIME DUE TO A SHORTAGE OF SCHOOL TRAINED 8541’s IN THE FLEET CANNOT AFFORD TO ACCEPT ANY MARINE NOT CURRENTLY FILLING AN 8541 BILLET OR SLATED TO FILL AN 8541 BILLET.
10. UNIT ARMORERS WILL BE REQUIRED TO STAY UNTIL THE FINAL CHECK IN OF ALL WEAPONS AND EQUIPMENT IS COMPLETED BETWEEN SCOUT SNIPER SCHOOL AND DIVISION SCHOOLS ARMORY.