United States Marine Corps Squad Advanced Marksman Rifle

United States Marine Corps Squad Advanced Marksman Rifle

A U.S. Marine Corps marksman of the 22nd MEU, with the SAM-R, in Afghanistan.
Type Sniper rifle/designated marksman rifle
Place of origin United States
Service history
In service 2001–present[1]
Wars War in Afghanistan
Iraq War
Specifications
Weight 10 lb (4.5 kg) (Fully loaded, w/ Heavy Barrel, Optic & 30 Rounds)
Length 39.5 in (1,000 mm)
Cartridge 5.56 mm NATO
Action Gas-operated, Rotating bolt
Rate of fire Semi-automatic
Muzzle velocity 3,050 ft/s (930 m/s)
Effective firing range 600 yards (550 m)
Feed system 20- or 30-round STANAG Magazine

The Squad Advanced Marksman Rifle (SAM-R) was a semi-automatic rifle developed by and in service with the United States Marine Corps. It gave Marines the capability to provide precision fire in support of the rifle squad, providing precision fire in support of an assault, and aid in observation and adjusting of supporting arms. After the introduction of the M27 Infantry Automatic Rifle, it became used as the designated marksman rifle, as it is issued in each fireteam and has a free-floating barrel and precision trigger.[1]

Background

The Squad Advanced Marksman and his weapon, the Squad Advanced Marksman Rifle, was the product of extensive experimentation by the Marine Corps Warfighting Laboratory (MCWL) of the addition of a designated marksman to a Marine squad. The concept of a designated marksman was already in use by the 4th Marine Expeditionary Brigade (Anti-Terrorism) and Marine Corps Security Force Regiment. In exercises, a Marine with a scoped rifle and additional training provided immense benefit to small units. An optic provides information-gathering abilities as well as aiding aiming of support weapons such as machine guns and mortars.

The armorers at the MCWL decided to use the M16 rifle in order to maintain a certain level of commonality in both weapon and ammunition. There was some talk of adopting a weapon such along the same lines as the Mk 11 Mod 0, but instead that transferred over to a possible replacement for USMC personnel now using the Designated Marksman Rifle (DMR), a variant of the M14.

The SAM-Rs were assembled by the Precision Weapons Section of the Weapons Training Battalion at Marine Corps Base Quantico. For the War on Terrorism, the approximately 100 assembled SAM-Rs were sent to the 22nd, 24th, and 26th Marine Expeditionary Units (MEU) of II Marine Expeditionary Force (MEF), which is located at Camp Lejeune, North Carolina. Squad Advanced Marksmen of I MEF, which is based at Camp Pendleton, California, made do with M16A4s with KAC M5 RAS forearms and TA31F ACOGs. They were nicknamed "West Coast SAM-Rs" though they are simply M16A4s with optics and bipods, and not an 'accurized' platform like the SAM-R used by the Marines of II MEF.

Specifications

The original test weapon was a modified M16A4 rifle with a free-floated 1:7 stainless steel match grade heavy barrel, a "Mil-Std-1913 modular rail system" (this most likely implies the use of the Knight's Armament Company Free-Floating Rail Adapter System) and an M16A1 trigger assembly (semi and full-auto functioning). A number of day optics were used initially, which included Hensoldt Blitz, Leupold CQ/T, ACOG, Leupold TS-30A1 and ultimately the Leupold TS-30A2. The test night optic was the AN/PVS-17B, apparently now being fielded with USMC combat units though the AN/PVS-22 is preferred.

The later SAM-R was roughly a modified M16A4 pattern rifle:

See also

Wikimedia Commons has media related to SAMR.

References

  1. 1 2 Marine brass endorses infantry plan to ditch M16 for M4 - Militarytimes.com, 27 July 2015

External links


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