Crew served infantry weapons are usually craft, vehicle or helicopter mounted

Crew Served Infantry Weapons Systems. Crew served infantry weapons are usually craft, vehicle or helicopter mounted. They provide heavy, mobile fire support to infantry units at the beachhead and inshore.

1. M2 .50 Caliber Machine Gun (Ma Deuce): The Browning M2 .50 Caliber Machine Gun, Heavy barrel is an automatic, recoil operated, air-cooled machine gun with adjustable headspace and is crew transportable with limited amounts of ammunition over short distances. By repositioning some of the component parts, ammunition may be fed from either the left or right side. A disintegrating metallic link-belt is used to feed the ammunition into the weapon. This gun has a back plate with spade grips, trigger, and bolt latch release. This gun may be mounted on ground mounts and most vehicles as an anti-personnel and anti-aircraft weapon. The gun, which was originally designed by John Browning, has changed little since it was used World War I, The total gun system weighs 128 pounds. The M2 is capable of firing 550 one half inch rounds per minute. The maximum effective range is 2000 meters.

2. 
   M-240G Medium Machine Gun. The M240G Machine Gun is the ground version of the original M240/M240E1, 7.62mm medium class weapon designed as a coaxial/pintle mounted machine gun for tanks and light armored vehicles. The rate of fire may be controlled by three different regulator settings. The M240G is modified for ground use by the installation of an "infantry modification kit," comprised of a flash suppressor, front sight, carrying handle for the barrel, a buttstock, infantry length pistol grip, bipod, and rear sight assembly. While possessing many of the same basic characteristics as the M60 series medium class machine guns, the durability of the M240 system results in superior reliability and maintainability when compared to the M60. The Marine Corps is replacing the M60E3 with the M240G. The ground version of the M240 allows for a common medium machine gun throughout the Marine Corps. The M240G weighs 24.2 pounds and has a maximum effective range of 1.1 miles. It is capable of 200 rounds per minute in a rapid fire mode and a sustained rate of 100 rounds.
   

3. 
   M60E3 7.62mm Machine Gun. The M60E3 7.62mm machine gun is a lightweight, air-cooled; disintegrating metallic link-belt fed, portable or tripod mounted machine gun designed for ground operations like its predecessor, the M60. It is gas operated with fixed headspace and timing which permits rapid changing of barrels. Slightly different from its "parent," the M60, the M60E3 has a receiver-attached bipod, which easily deploys for stability. It has an ambidextrous safety, universal sling attachments, a carrying handle on the barrel, and a simplified gas system that does not require safety wire to prevent loosening. The M60E3 (light weight version of the parent M60) was fielded with the intention to reduce the load carried by the gunner. This gun will be replaced by the M240G. The M60E3 weighs 18.75 pounds and has a maximum effective range of 3609.1 feet. It is capable of 100 rounds per minute in both rapid and sustained fire modes.
   

4. 
   MK19 40mm Machine Gun, MOD 3. The MK19 40mm machine gun, MOD 3 is an air-cooled, disintegrating metallic link-belt fed, blowback operated and fully automatic weapon and is crew transportable over short distances with limited amounts of ammunition. It can fire a variety of 40mm grenades. The M430 HEDP 40mm grenade will pierce armor up to 2 inches thick, and will produce fragments to kill personnel within 5 meters and wound personnel within 15 meters of the point of impact. Associated: components are: MK64 Cradle Mount, MOD 5; M3 Tripod Mount; and the AN/TVS-5 Night Vision Sight. The MK19 also mounts in the up-gunned weapons station of the LVTP7A1 model of the AAV and vehicle ring mounts. The MK19 was originally developed to provide the U.S. Navy with an effective reverie patrol weapon in Vietnam. The MK19 system weighs 137.5 pounds and has a maximum effective range of 1600 meters. It is capable of firing 60 rounds per minute in rapid fire mode and 40 rounds per minute in sustained fire mode.
   

5. 
   Squad Automatic Weapon (SAW), M249 Light Machine Gun The SAW is a hand-held combat machine gun. The Squad Automatic Weapon (SAW), or 5.56mm M249 is an individually portable, gas operated, magazine or disintegrating metallic link-belt fed, light machine gun with fixed headspace and quick-change barrel feature. The M249 engages point targets out to 800 meters, firing the improved NATO standard 5.56mm cartridge. The SAW forms the basis of firepower for the fire team. The gunner has the option of using 30-round M16 magazines or linked ammunition from pre-loaded 200-round plastic magazines. The gunner's basic load is 600 rounds of linked ammunition. The M249 system, with bipod and tools weighs 15.16 pounds. A 200 round box magazine weighs 6.92 pounds, while a 30 round magazine weighs 1.07 pounds. The maximum effective range is 3281 feet and it can fire a sustained rate of 85 rounds per minute.
   

4. 
   Individual Infantry Weapons Systems Individual infantry weapons systems are those weapons carried on the amphibious warrior’s person. They are operated by one person and used for offensive or defensive purposes.
   

1. 
   M16A2 5.56mm Rifle. The M16A2 5.56mm rifle is a lightweight, air-cooled, gas-operated, magazine-fed, shoulder- or hip-fired weapon designed for either automatic fire (3-round bursts) or semiautomatic fire (single shot) through the use of a selector lever. The weapon has a fully adjustable rear sight. The bottom of the trigger guard opens to provide access to the trigger while wearing winter mittens. The upper receiver/barrel assembly has a fully adjustable rear sight and a compensator which helps keep the muzzle down during firing. The steel bolt group and barrel extension are designed with locking lugs which lock the bolt group to the barrel extension allowing the rifle to have a lightweight aluminum receiver. The M16A2 rifle is a product improvement of the M16A1 rifle. The M-16A2 weighs 8.79 pounds and has a maximum effective range of 1,804.5 feet on a point target. It can fire 45 rounds a minute in semi automatic and 90 rounds per minute in burst mode. The M-4 is the carbine version of the M-16 family. It is equipped with a collapsing stock, shortened barrel and a rail system allowing numerous accessories to be mounted on the weapon. The M-4 is replacing the MP-5 as the primary CQB weapon in the Navy Special Operations community.
   

2. 
   M203 40m Grenade Launcher. The M203 40mm Grenade Launcher is used while attached to an M16A2 5.56mm rifle. It is a lightweight, compact, breech loading; pump action, single shot launcher. The launcher consists of a hand guard and sight assembly with an adjustable metallic folding, short-range blade sight assembly, and an aluminum receiver assembly which houses the barrel latch, barrel stop and firing mechanism. The launcher is capable of firing a variety of low velocity 40mm ammunition. The launcher also has a quadrant sight, which may be attached to the M16A2 carrying handle and is used when precision is required out to the maximum effective range of the weapon. The M203 was designed and procured as the replacement for the M79 grenade launcher of the Vietnam era. The launcher weighs 3 pounds and has a maximum effective range of 492.15 feet on a point target. The maximum safe range in training is 426.53 feet and in combat is 101.71 feet.
   

3. 
   MP-5N Heckler and Koch 9mm Submachine Gun. The MP5-N fires from a closed and locked bolt in either the automatic or semiautomatic modes. This gun is recoil operated and has a unique delayed roller locked bolt system, a retractable butt stock, a removable suppressor, and illuminating flashlight integral to the forward handguard. The flashlight is operated by a pressure switch custom fitted to the pistol grip. This is the same basic weapon used by the FBI's Hostage Rescue Team and other world-class counter-terrorist organizations. The present inventory includes both suppressed and non-suppressed versions of the MP5. The basic configuration of this weapon makes for an ideal size, weight, and capable (accuracy, lethality, reliability, etc.) close quarters battle weapon system. This weapon is manufactured by Heckler and Koch and is presently fielded to Marine Corps Force Reconnaissance Companies and Marine Security Force Battalions. It is currently considered as one of the main weapons in the close quarters battle (CQB) environment. The MP-5 is equipped with a collapsible stock and weighs 7.44 pounds with a 30 round magazine inserted. It has a rate of fire of 800 rounds per minute and a maximum effective range of 328.1 feet.
   

4. 
   M9 Pistol. The M9 is a lightweight; semiautomatic9 millimeter pistol manufactured by Beretta and designed to replace the M1911A1 .45 caliber pistol and .38 caliber revolvers. The M9 has redundant automatic safety features to help prevent unintentional discharges. It can be fired in either double or single action mode and can be unloaded without activating the trigger while the safety is in the "on" position. The M9 pistol has a 15-round magazine, and may be fired without a magazine inserted. This weapon can have the hammer lowered from the cocked, "ready to fire," position to the uncocked position without activating the trigger by placing the thumb safety on the "on" position. The M-9 weighs 2.55 pounds fully loaded and has a maximum effective range of 152.5 feet.
   

1. 
   MEU (SOC) Pistol. This weapon is a modified M1911A1 .45-caliber pistol sometimes referred to as "near match" or "combat accuratized." The MEU (SOC) Pistol is the designated "backup weapon" of Marines armed with the 9mm MP5-N Close Quarters Battle weapon. The M1911A1 was chosen for this role (and its modifications generated) because of its inherent reliability and lethality, and because the MEU (SOC) modifications make the M1911A1 design more "user friendly." The weapon modifications were designed in 1986 to meet the requirements of the MEU (SOC). Each pistol is hand-built by specially trained armorers at the Rifle Team Equipment (RTE) shop, Quantico, Virginia. The MEU (SOC) pistol weighs 3 pounds fully loaded, has a magazine capacity of 7 rounds and a maximum effective range of 164 feet.