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Encyclopedia > M40 (rifle)
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M40A1
Technical Summary
The M40A1
Caliber: 7.62 x 51 mm NATO
Action: Bolt action
Mass: 6.57 kg (14.48 lb)
Length: 1117 mm (43.97 in)
Barrel length: 610 mm (24 in)
Barrel: Hart
Lands and grooves: 6
Twist: Right hand, 1:12
Trigger pull: 13 to 22 N (3 to 5 lbf)
Magazine: 5 rounds
Sight:

Unertl 10x with Mil-Dots and BDC; specially designed for USMC USMC photo of M40A1 rifle. ... Jump to: navigation, search The word caliber (American English) or calibre (British English) designates the interior diameter of a tube or the exterior diameter of a wire or rod. ... NATO 7. ... In firearms terminology, an action is the system of operation that the firearm employs to seal the breech (in a breech-loading firearm), and to load consecutive rounds. ... A bolt-action firearm is one that is manually operated (i. ... The international prototype, made of platinum-iridium, which is kept at the BIPM under conditions specified by the 1st CGPM in 1889. ... The pound is the name of a number of units of mass or weight, all in the range of 300 to 600 grams. ... IN or in may stand for: India ISO country code Indiana state code Indium In symbol for the chemical element Intelligent network a telecommunications architecture Car designation for Ingolstadt Inch In Nomine Look up IN in Wiktionary, the free dictionary This is a disambiguation page — a navigational aid which lists... Jump to: navigation, search The newton (symbol: N) is the SI unit of force. ... The pound-force is a non-SI unit of force or weight (properly abbreviated lbf or lbf). The pound-force is equal to a mass of one pound multiplied by the standard acceleration due to gravity on Earth (which is defined as exactly 9. ... Categories: Military stubs | Firearm components ...

Stock: McMillan fiberglass
Effective range: 915 m (1000 yd)

M40A3
Technical Summary
Image:M40A31.jpg
Caliber: 7.62 x 51 mm NATO
Action: Bolt action
Mass: 7.5 kg (16.5 lb)
Length: 1124 mm (44.25 in)
Barrel length: 610 mm (24 in)
Barrel: Schneider Match Grade SS #73
Lands and grooves: 5
Twist: Right hand, 1:12
Trigger pull: 13 to 22 N (3 to 5 lbf)
Magazine: 5 rounds
Sight:

Schmidt and Bender 3-12x50 with generation 2 reticle; specially designed for USMC This article is about the unit of measure known as the yard. ... Jump to: navigation, search The word caliber (American English) or calibre (British English) designates the interior diameter of a tube or the exterior diameter of a wire or rod. ... NATO 7. ... In firearms terminology, an action is the system of operation that the firearm employs to seal the breech (in a breech-loading firearm), and to load consecutive rounds. ... A bolt-action firearm is one that is manually operated (i. ... N is the fourteenth letter of the modern Latin alphabet. ... The pound-force is a non-SI unit of force or weight (properly abbreviated lbf or lbf). The pound-force is equal to a mass of one pound multiplied by the standard acceleration due to gravity on Earth (which is defined as exactly 9. ... Categories: Military stubs | Firearm components ...

Stock: McMillan Tactical A4
Effective range: 915 m (1000 yd)

The M40 is a sniper rifle used by the United States Marine Corps. It has had three variants — 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. This article is about the unit of measure known as the yard. ... A U.S. Army soldier peers through a scope mounted atop his M-21 rifle during operations in Iraq A sniper rifle is a type of rifle used for engaging in the act of sniping, most purely a rifle used for shooting with great accuracy over long distances. ... Jump to: navigation, search United States Marine Corps Emblem The United States Marine Corps (USMC) is a branch of the U.S. military. ...


Each weapon is hand-built by USMC armorers at Marine Corps Base Quantico, using components from a number of suppliers. New A3s 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 scopes, and smaller user modifications. The Marine Corps Base Quantico, near Fredericksburg, Virginia, is one of the largest United States Marine Corps bases in the world. ...


The original M40 was a military type classified version of the Remington 700; it was factory-made, had a one-piece wood stock, and some other differences to later models. The M40A1 and A3 switched to fiberglass, and there were new scopes used as well. The M24 Sniper Weapon System The M24 SWS is the military version of the Remington 700 sniper rifle. ...

Contents


History

During the Vietnam war, the Marine Corps decided they needed a standard sniper rifle. After testing several possibilities, they ordered 700 Remington Arms [1] Model 40x rifles (target/varmint version of the Model 700 bolt action rifle) and given the M40 designation. Most had a Redfield [2] 3-9 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 tweaks, replacing the original wood stocks with McMillan[3] fiberglass stocks as well as replacing the original Redfield scopes with Unertl [4] scopes. Remington Arms - Wikipedia, the free encyclopedia /**/ @import /skins-1. ... The Model 700 series of firearms are hunting rifles manufactured by Remington Arms. ... A bolt-action firearm is one that is manually operated (i. ...


The US Army also uses the Remington 700/40x action as the basis for its M24 SWS (Sniper Weapon System). The primary difference between the two rifles is that while the USMC M40/A1/A3 utilizes the short action version of the Remington 700/40x (designed for shorter cartridges, such as .308 Winchester, 7 mm/08 Remington, .243 Winchester), the Army M24 uses the long action version of the same rifle (designed for full-length cartridges, such as the 30-06 Springfield, and "short" magnum cartridges, such as the 7 mm Remington Magnum, .300 Winchester Magnum and .338 Winchester Magnum). The US Army reasoning behind this decision was to allow them to reconfigure the rifle in the larger, longer-range calibers if necessary. Whether or not they will do this is anyone's guess, but one might note that the British Royal Marines, among others, have adopted rifles in .300 Winchester Magnum and .338 Lapua as special purpose sniper rifles. The M24 Sniper Weapon System The M24 SWS is the military version of the Remington 700 sniper rifle. ... The M24 SWS is the military version of the Remington 700 rifle. ... Winchester Magnum refers to a family of cartridges developed by the Winchester Repeating Arms Company [1], one of the oldest firearms manufacturers in the United States, in the late 1950s and early 1960s, all based on the same basic cartridge case. ... Winchester Magnum refers to a family of cartridges developed by the Winchester Repeating Arms Company [1], one of the oldest firearms manufacturers in the United States, in the late 1950s and early 1960s, all based on the same basic cartridge case. ... The Corps of Royal Marines, usually just known as the Royal Marines (RM), are the United Kingdoms amphibious forces and a core component of the countrys Rapid Deployment Force. ... Winchester Magnum refers to a family of cartridges developed by the Winchester Repeating Arms Company [1], one of the oldest firearms manufacturers in the United States, in the late 1950s and early 1960s, all based on the same basic cartridge case. ... The . ...


M40A3

Development of the M40A3 began in 1996, and the final product was revealed in 2001. Since then, numerous minor changes have occurred to the platform. It is highly possible that more changes will occur to the platform as it gains operational use in Iraq and Afghanistan. Listed here is the latest configuration known to be used in an M40A3.


Action - The M40 has always been based on the tried and true Remington 700 Short Action (as opposed to the Long Action in the M24), and this is no different in the M40A3. These actions are all chambered in 7.62 mm NATO and are house tuned by Marine armorers; the trigger guard assembly is manufactured by the DD Ross Company, though several M40A3s use Badger Ordnance trigger guards. The M24 Sniper Weapon System The M24 SWS is the military version of the Remington 700 sniper rifle. ... NATO 7. ...


Barrel - The barrel is a Schneider 24" (25") 5-groove 1:12" match-grade heavy barrel.


Stock - All service M40A3s are based upon the A4 Tactical Riflestock, a high-quality benchrest-style fiberglass riflestock made by McMillan Fiberglass Stocks and cast molded in an OD Green color. The action is glass bedded into the stock with aluminum pillars, while the barrel is allowed to 'float' (it is attached only to the action), ensuring maximum accuracy. The stock has adjustable length-of-pull (through a buttstock spacer system) and an adjustable saddle-type cheekpiece.


Dayscope - A Schmidt and Bender 3-12x50 riflescope has been contracted to replace the MST-100 Unertl type fixed 10x day scope currently used for the M40A3. The dayscope is mounted with Badger Ordnance Maximum scope rings, with a standard ring in the rear and a wider MAX50-brand ring in front, to allow for the mounting of a Badger Ordnance ringcap (enabling the mounting of SIMRAD add-on night vision devices).


Images

A Marine extracts and chambers a new round in his M40-A3
A Marine extracts and chambers a new round in his M40-A3
M40A3
M40A3


Image File history File links Download high resolution version (3008x1960, 1434 KB)PhotoID: 20041110221919 Submitted by: MCB Hawaii Operation/Exercise/Event: Training Caption: Cpl. ... Image File history File links Download high resolution version (3008x1960, 1434 KB)PhotoID: 20041110221919 Submitted by: MCB Hawaii Operation/Exercise/Event: Training Caption: Cpl. ... Image File history File links Download high resolution version (1097x491, 574 KB)PhotoID: 2003925151633 Submitted by: MCB Camp Pendleton Operation/Exercise/Event: sniper Caption: The M-40A3 is the new precision fire weapon used by Marine snipers. ... Image File history File links Download high resolution version (1097x491, 574 KB)PhotoID: 2003925151633 Submitted by: MCB Camp Pendleton Operation/Exercise/Event: sniper Caption: The M-40A3 is the new precision fire weapon used by Marine snipers. ...


Comparison

Differences
  M40A1 M40A3
Weight 6.57 kg (14.45 lb) 7.5 kg (16.5 lb)
Overall Length 1.117 m (44.0 in) 1.124 m (44.25 in)
Barrel Hart Schneider Match Grade SS #73
Lands and Grooves 6 5
Stock McMillan fiberglass McMillan Tactical A4


The international prototype, made of platinum-iridium, which is kept at the BIPM under conditions specified by the 1st CGPM in 1889. ... The pound is the name of a number of units of mass or weight, all in the range of 300 to 600 grams. ... The metre, or meter (symbol: m) is the SI base unit of length. ... Mid-19th century tool for converting between different standards of the inch An inch is an Imperial and U.S. customary unit of length. ...


See also

Lists:

Related designation // Bladed weapons Bayonets M9 bayonet M7 bayonet OKC-3S bayonet Fighting Knives Ka-Bar Small arms Pistols .38 Caliber Revolver M1911A1 . ... Individual weapons by type and current level of use. ... List of all weapons currently in development, production, or significant service in the world. ...


  Results from FactBites:
 
SC Rifleworks SCM40 Sniper Rifle (965 words)
The SC-M40 is a replica of the USMC M40 sniper rifle of 1966.
The M40 served the USMC from 1966 through the end of the Vietnam conflict with a total of 750 having been produced.
The rifle proved effective during the conflict, though the scope was a bit fragile and the rifle had its problems.
M40A1 Sniper Rifle (440 words)
Introduced in 1966 the M40 sniper rifle is the precursor to all modern American military sniper weapons.
Before the M40 was introduced, sniping functions were performed by battle rifles that had been adapted (match grade components and barrel, quality optics) for the purpose.
The original M40 rifles were military grade Remington Model 700 bolt action rifles chambered to fire the NATO 7.62mm (.308 Winchester) cartridge and built to Marine Corps specifications and delivered in 1966.
  More results at FactBites »


 

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