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United States Marine Corps Squad Advanced Marksman Rifle
The Squad Advanced Marksman Rifle (SAM-R) is a semi-automatic designated marksman rifle developed and used by the United States Marine Corps. It gave users the capability to provide fire in support of a rifle squad, providing precision fire in support of an assault, and aid in observation and adjusting of supporting arms. The SAM-R was retired by the U.S. military in the mid-2010s and thus is no longer in service, having been replaced by the M27 IAR. 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 informati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Designated Marksman Rifle
A designated marksman rifle (DMR) is a modern telescopic sight, scoped high-Accuracy and precision, precision rifle used by infantrymen in the designated marksman (DM) role. It generally fills the engagement effective range, range gap between a service rifle and a dedicated sniper rifle, at around . DMRs, unlike the often bolt-action sniper rifles, are semi-automatic rifle, semi-automatic as these have higher rate of fire, rates of fire and typically larger magazine (firearms), magazine capacities (10, 20, or 30 rounds depending on the firearm and operational requirements) to allow rapid engagement of multiple targets. These rifles have to be effective, in terms of probability of kill, hit rates and terminal ballistics, at application ranges exceeding those of ordinary assault rifles and battle rifles, but do not require the extended-range performance of a dedicated sniper rifle. DMRs need to function as part of squad (and possibly at close quarters) and often share some basic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy Mark 11 Mod 0 Sniper Weapon System
The SR-25 (Stoner Rifle-25) is a designated marksman rifle and semi-automatic sniper rifle designed by Eugene Stoner and manufactured by Knight's Armament Company. The SR-25 uses a rotating bolt and a direct impingement gas system. It is loosely based on Stoner's AR-10, rebuilt in its original 7.62×51mm NATO caliber. Up to 60% of parts of the SR-25 are interchangeable with the AR-15 and M16—everything but the upper and lower receivers, the hammer, the barrel assembly and the bolt carrier group. SR-25 barrels were originally manufactured by Remington Arms with its 5R (five grooves, right twist) rifling, with twist 1:11.25. The heavy barrel is free-floating, so handguards are attached to the front of the receiver and do not touch the barrel. History In the late 1950s, Eugene Stoner designed the AR-10 battle rifle to equip U.S. troops. It was accurate for an auto-loading rifle, but it lost the competition to the M14 rifle. The patent rights for the AR-10 and the AR-15 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Free-floating Barrel
A free-floating barrel is a firearm design used in precision rifles, particularly match grade benchrest rifles, to accurize the weapon system. With conventional rifles, the gun barrel rests in contact with the fore-end of the gunstock, sometimes along the whole length. If the stock is manufactured from wood, environmental conditions or operational use may warp the wood, which may also cause the barrel to shift its alignment slightly over time, altering the projectile's external ballistics and thus the point of impact. Contact between the barrel and the stock also interferes with the natural frequency of the barrel, which can have a detrimental effect on accuracy especially when the barrel gets hot with repeated firing. The interference of the stock with the barrel's oscillation harmonics as the bullet passes down the bore can cause the barrel to vibrate inconsistently from shot to shot, depending on the external forces acting upon the stock at the time of the shot. Micro-v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M4 Carbine
The M4 carbine (officially Carbine, Caliber 5.56 mm, M4) is a 5.56×45mm NATO, gas-operated, magazine-fed carbine developed in the United States during the 1980s. It is a shortened version of the M16A2 assault rifle. The M4 is extensively used by the United States Armed Forces, with decisions to largely replace the M16 rifle in United States Army (starting 2010) and United States Marine Corps (USMC) (starting 2016) combat units as the primary infantry weapon and service rifle. The M4 has been adopted by over 60 countries worldwide, and has been described as "one of the defining firearms of the 21st century". Since its adoption in 1994, the M4 has undergone over 90 modifications to improve the weapon's ergonomics and modularity, including: the M4A1, which strengthened the barrel and removed the burst-fire option; the SOPMOD, an accessory kit containing optical attachments; and the underbarrel M203 grenade launcher. In April 2022, the U.S. Army selected the SIG MCX SPEAR ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
M27 Infantry Automatic Rifle
The M27 Infantry Automatic Rifle (IAR) is a 5.56mm select-fire assault rifle, based on the HK416 by Heckler & Koch. It is used by the United States Marine Corps (USMC) and is intended to be issued to all infantry riflemen as well as automatic riflemen. The USMC initially planned to purchase 6,500 M27s to replace a portion of the M249 light machine guns employed by automatic riflemen within Infantry and Light Armored Reconnaissance Battalions. Approximately 8,000–10,000 M249s will remain in service with the Marine Corps to be used at the discretion of company commanders. In December 2017, the Marine Corps announced that it would equip every member of an infantry squad with the M27, replacing the current M4 carbines and M16A4 rifles. Background In 1999, a Universal Need Statement was issued for an IAR. Around 2000, the 1st Marine Division’s 2nd Battalion, 7th Marines Regiment conducted initial, limited IAR trials which confirmed the desirability of a light automatic rifle. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advanced Combat Optical Gunsight
The Advanced Combat Optical Gunsight (ACOG) is a series of prismatic telescopic sights manufactured by Trijicon. The ACOG was originally designed to be used on the M16 rifle and M4 carbine, but Trijicon has also developed ACOG accessories for other firearms. Models provide fixed-power magnification levels from 1.25× to 6×. ACOG reticles are illuminated at night by an internal tritium phosphor. Some versions have an additional daytime reticle illumination via a passive external fiberoptic light pipe or are LED-illuminated using a dry battery. The first ACOG model, known as the TA01, was released in 1987. History The first ACOG model, known as the TA01, was released in 1987. In 1995, United States Special Operations Command selected the 4×32 TA01 as the official scope for the M4 carbine and purchased 12,000 units from Trijicon. Between 2004 and 2005, the ACOG was selected as the official Rifle Combat Optic of the United States Marine Corps, prompting Trijicon to produce 100,000 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
I Marine Expeditionary Force
The I Marine Expeditionary Force ("I" pronounced "One") is a Marine Air Ground Task Force (MAGTF) of the United States Marine Corps primarily composed of the 1st Marine Division, 3rd Marine Aircraft Wing, and 1st Marine Logistics Group. It is based at Marine Corps Base Camp Pendleton. I Marine Expeditionary Force is the largest of the three MEFs in the Fleet Marine Force and is often referred to as the "Warfighting MEF" for its consistent involvement and contributions in major armed conflicts. It is presently commanded by Lt. Gen. George W. Smith Jr. The deputy commander is Brig. Gen. Ryan S. Rideout. Etymology Pronunciation of the Roman numeral designator: As a Roman numeral the capital letter "I", representing one, is properly pronounced as "One". However, there are some who erroneously pronounce the number as either "First", or either intentionally, or unknowingly, pronounce it as "Eye", as in the letter "I". The convention of using Roman numerals to designate a MEF, whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
II Marine Expeditionary Force
The II Marine Expeditionary Force (II MEF) is a Marine Air-Ground Task Force consisting of ground, air and logistics forces capable of projecting offensive combat power ashore while sustaining itself in combat without external assistance for a period of 60 days. The II Marine Expeditionary Force is commanded by a lieutenant general, who serves under U.S. Marine Corps Forces Command, providing Marine fighting formations and units to European Command, Central Command and Southern Command. The current Commanding General is Lieutenant General David A. Ottignon. The Deputy Commanding General is Brigadier General Andrew T. Priddy. Higher headquarters II MEF falls under the command of U.S. Marine Corps Forces Command (MARFORCOM), and is a service retained force, meaning it is not assigned or allocated to any of the Geographic Combatant Commands. However, II MEF regularly provides subordinate units in support of operations and exercises throughout the U.S. European Command, U.S. Afr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
26th Marine Expeditionary Unit
The 26th Marine Expeditionary Unit (26th MEU) is one of seven such units currently in existence in the United States Marine Corps. It is an air-ground task force with a strength of about 2,400 personnel when at full strength during a deployment. It consists of four major parts: a command element, a ground combat element, an aviation combat element, and a logistics combat element. Since its establishment in the early 1970s as the 26th Marine Amphibious Unit, it has deployed extensively, and participated in numerous combat and contingency operations, as well as training exercises. The 26th MEU is based out of Marine Corps Base Camp Lejeune in the U.S. state of North Carolina. Current major subordinate elements As of 6 December 2013, the 26th MEU is decomposed and does not have reinforcing commands. The following units participated in the MEU's deployment from March–November 2013: Ground Combat Element: Battalion Landing Team 3/2 Aviation Combat Element: Marine Medium Til ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
24th Marine Expeditionary Unit
The 24th Marine Expeditionary Unit (24th MEU) is one of seven Marine Expeditionary Units currently in existence in the United States Marine Corps. The Marine Expeditionary Unit is a Marine Air Ground Task Force (MAGTF) with a strength of about 2,200 personnel. The MEU consists of a Command Element, a Ground Combat Element based on a reinforced infantry battalion, an Aviation Combat Element based on a reinforced tiltrotor squadron, and a Logistics Command Element based on a Combat Logistics Battalion. The 24th MEU is currently based out of Marine Corps Base Camp Lejeune, North Carolina. Its stated mission is to provide geographic combatant commanders with a forward-deployed, rapid-response force capable of conducting conventional amphibious and selected maritime special operations at night or under adverse weather conditions from the sea, by surface and/or by air while under communications and electronics restrictions. Current subordinate units * Ground Combat Element: 2nd Bat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
22nd Marine Expeditionary Unit
The 22nd Marine Expeditionary Unit (22nd MEU) is one of seven such units currently in existence in the United States Marine Corps. It is a Marine Air Ground Task Force with a strength of about 2,200 personnel. They are currently based out of Marine Corps Base Camp Lejeune, North Carolina and fall under the command of the II Marine Expeditionary Force. It is the most decorated of the U.S. Marine Corps' seven MEUs. Mission "Provide the United States with a forward-deployed, amphibious force-in-readiness capable of executing mission across the full spectrum of combat and military operations other than war." Structure The MEU consists of four basic elements: Command Element (CE): Serves as the headquarters for the entire unit and allows a single command to exercise control over all ground, aviation and combat service support forces. Ground Combat Element (GCE): Built around a Marine infantry battalion, the GCE is reinforced with tanks, artillery, amphibious vehicles, engineers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
War On Terrorism
The war on terror, officially the Global War on Terrorism (GWOT), is an ongoing international counterterrorism military campaign initiated by the United States following the September 11 attacks. The main targets of the campaign are militant Islamist and Salafi-Jihadist armed organisations such as Al-Qaeda, the Islamic State and their international affiliates; which are waging military insurgencies to overthrow governments of various Muslim countries. The "war on terror" uses war as a metaphor to describe a variety of actions which fall outside the traditional definition of war taken to eliminate international terrorism. 43rd President of the United States George W. Bush first used the term "war on terrorism" on 16 September 2001, and then "war on terror" a few days later in a formal speech to Congress. Bush indicated the enemy of the war on terror as "a radical network of terrorists and every government that supports them." The initial conflict was aimed at al-Qaeda, with th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
