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M40

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M-40A3
M40
Country of origin

United States of America

Manufacturer(s)

Remington Arms

Designer(s)

United States Marine Corps

Production began

c. 1966

Weapon type

Sniper Rifle

Caliber

7.62x51mm NATO

Action

Bolt-action

Overall length
  • M40A1: 1,117 mm (43.97 in)
  • M40A3: 1,124 mm (44.25 in)
  • Barrel length
  • M40: 660 mm
  • M40A1: 610 mm
  • Weight empty
  • M40A1: 6.57 kg (14.48 lb)
  • M40A3: 7.5 kg (16.5 lb) [weights w/ scope and loaded]
  • Magazine/Cylinder capacity

    5 round integral box magazine; 6 rounds (M40A3 only) integral box magazine

    Maximum effective range
  • M40: 800 meters
  • M40A1/A3: 915 meters
  • Muzzle velocity

    2,550 f/s

    Used by

    United States Marine Corps


    The M40 is a bolt-action sniper rifle. It is chambered in 7.62x51mm NATO.

    HistoryEdit

    This rifle came about during the Vietnam War, when the United States Marine Corps made a decision to purchase purpose-made sniper rifles (prior to this, snipers simply used accurized service rifles with a telescopic sight mounted). Remington offered their Model 40XB target rifle action (target tuned model 700 action with heavy barrel) to the USMC in April 1966 for trials. Initially, 800 rifles were offered under the designation "M40 sniper rifle", and a total of 995 M40 rifles were built by Remington. Original M40s were built on Remingtons' model 700BDL actions with one piece wooden stocks.

    In the 1970s, the initial M40s began to wear out. The Marine Corps began rebuilding their M40s with polymer McMillan stocks and began using a different optic for the rifles, designating the rifle "M40A1". The M40A1s and later variants are built in Quantico by qualified USMC armorers with parts supplied by Remington (actions), Winchester (magazine floor plate) and other contractors.

    Later variants (M40A3, M40A5) incorporated more improvements to the rifle.

    Design detailsEdit

    The M40 rifle is a heavily modified Remington Model 700. It features a heavy, accurized barrel and a "short action" (for a Remington model, the distance between the receiver screws is 6.5 inches; this means it cannot accommodate longer cartridges such as the .30-06 or .270 Winchester[1]).

    ReferencesEdit

    1. Long action vs Short action

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