Marine: A Guided Tour of a Marine Expeditionary Unit

by Tom Clancy

  JOHN D. GRESHAM

  * MOS 8531--Rifle Range Coach/Instructor: This course qualifies an enlisted Marine to safely run a firearms range and to teach the current doctrine and skills to recruits or officer candidates.

  * MOS 8532-Small Arms Weapons Instructor: An advanced version of the 8531 course, it emphasizes additional skills and concepts over a wider range of weapons and environments, particularly follow-up and proficiency training. Each MEU (SOC) would likely have one or more of these instructors.

  * MOS 9925--Range Officer: Assigned to supervise and manage the official training and shooting ranges of the Corps. Only thirty-two Marines can hold this designation at one time.

  * MOS 0306-Infantry Weapons Officer: The officer version of the 8532 course. A MEU (SOC) or regiment would likely have one such officer assigned.

  * MOS 8541-Scout/Sniper: This is the famous eight-week course that turns a Marine into the most deadly shooter in the U.S. arsenal, an 8541 Scout/Sniper. With a 40% dropout rate, it is one of the toughest courses in the U.S. military. Once a Marine completes this course, he is qualified to be assigned to a Scout/Sniper platoon in a MEU (SOC) or other unit.

  * MOS 8542--Advanced Scout/Sniper: This five week follow-up to the 8541 course teaches more advanced leadership, tracking, navigation, shooting, and weapons skills.

  * MOS 2112-Gunsmith: This is, perhaps, the most traditional course in the Weapons Training Battalion curriculum. It is designed to make a Marine into a completely qualified machinist and gunsmith. You would likely find a 2112 in every MEU (SOC), regiment, or major training base in the Corps. More than a course, it is a virtual apprenticeship. The first six months are spent teaching trainees to build their own tools and jigs. After that, they learn everything from welding broken parts to turning blanks into rifle barrels.

  Marines are not limited to taking and qualifying on just one of the MOS courses listed above. During an enlisted Marine's career he may qualify for many MOS codes, not unlike the way a Boy Scout collects merit badges on the way to Eagle Scout rank. The Corps values weapons skills, and encourages Marines to master them, ensuring that individual marksmanship will continue to be a living part of the Marine ethos.

  The Weapons Training Battalion is both an armory and a schoolhouse. Yet the battalion is not just sitting on its laurels. Innovations during the past year included moving targets on the qualification courses at Quantico, firing from inside nuclear/chemical/biological (NCB) suits, and a new night combat syllabus. Colonel Nance and his Marines are looking forward to the 21st century. In the next ten years, they expect to specify, test, field, and train a new combat rifle, a new combat shotgun, ammunition, and other systems.

  Firearms

  A Roman centurion evaluated his legionaires by their proficiency with sword and javelin. Genghis Khan judged his Mongol warriors by their skill at archery from horseback. Air Force pilots judge one another according to the quality of their "hands" on the stick. Among Navy aviators flying skills are judged by how well a pilot can "trap" during carrier landings. Every Marine is a rifleman, and the measure of a rifleman is marksmanship--the ability to cause a weapon to project a metal pellet across a volume of space so that it strikes a target with precision. I happen to like this way of sizing people up, because it is a skill that no one is born with. Shooting skills have to be learned. Unlike baseball or other sports which use the same innate reflexes as throwing rocks or swinging branches, there is no natural equivalent to shooting a firearm. Doing it well requires speed and precision--as well as stress and risk--greater than nature could ever evolve. Shooting skills are also gender-independent. The upper body strength required to shoot well is minimal. Despite the cultural traditions and legal barriers that restrict them from combat, women can learn to shoot just as well as men. Some of the top-scoring Russian snipers of World War II were women, and women compete equally with men in a number of Olympic shooting events.

  Within the Marine Corps, the ability to put metal onto a target is taught as a common skill. Every officer and enlisted Marine who graduates from the OCS or the Basic School learns to fire and qualify on a variety of firearms. Without an acceptable level of marksmanship, they cannot graduate, or for that matter, stay in the Corps. This emphasis on shooting benefits the Corps in many ways, both obvious and hidden. Most evident is the reluctance of our enemies to face Marines in combat. Before the first shots of the 1991 Gulf War were even fired, many Iraqi soldiers expected to be annihilated by the Marines facing them, so they surrendered when the ground war began. More practically, Marines who can accurately deliver aimed fire will use less ammunition, reducing the load on hard-pressed combat logistical systems.

  What follows is a look at Marine small arms today and tomorrow. We'll explore the heavier stuff later, but first we will learn about the weapons that define "Marine."

  M16A2 Combat Rifle

  The M 16A2 rifle is the standard weapon in Marine combat units. Basic marksmanship skills are established and evaluated with this rifle; and every Marine in the Corps, from the newest Private to the Commandant, can fire the M16A2 with precision. The M16 had its origin in German assault rifles, like the MP44, developed during World War II. The MP44 combined the precision of a semi-automatic bolt-action rifle with the firepower of a fully automatic submachine gun or machine pistol. The assault rifle allowed troops to lay down a heavy volume of fire with good accuracy and still have the mobility of light infantry.

  Following the war, many armies developed their own assault rifles (today called combat rifles), but with mixed results. The Russian AK-47, designed by Mikhail Kalashnikov, set the pattern for the modern combat rifle. Designed for cheap mass production, the AK-47 could fire semi-automatic (single-shot) or full-automatic (pull the trigger and get a stream of bullets). Because it was simple and rugged and easy to obtain, it became the symbol of Third World "popular liberation" movements during the Cold War. Western armies lagged behind Russia in combat rifle design during the 1950s, but began to catch up in the 1960s. Belgium's Fabrique Nationale (FN) and Germany's Heckler & Koch (H&K) produced 7.62mm combat rifles on the AK-47 model, but the United States still lagged. Because the U.S. Army had sunk a huge amount of money into a new semi-automatic rifle, the 7.62mm M 14, the Army rejected an experimental FN-type weapon, the T-48. The M 14 could be readily assembled by the same plants that built the Garand M-1 during World War II while the T-48 would have required massive industrial retooling.

  A 26th MEU (SOC) Marine test-fires an M16A2 combat rifle in the hangar bay of the USS Wasp (LHD-1). He is wearing the new AN/PVS-7B night-vision-goggle system, and the PAC-4C night-spotting system is attached to the top of the rifle's barrel.

  U.S. MARINE CORPS

  In the late 1960s, the North Atlantic Treaty Organization (NATO) standardized upon a smaller lightweight cartridge for future small arms, allowing more rounds to be carried by an infantrymen. Though this high-velocity 5.56mm/.223-inch round provided lethal hitting power (engineers use the gruesome term "wound ballistics"), there was strong resistance in the U.S. military to switching over to a new weapon firing it. What convinced the U.S. military to accept the new caliber was the Armalite AR-15, an automatic rifle designed by the brilliant Eugene Stoner in the late 1950s. Lighter and easier to fire accurately than the M 14, the AR-15 was a revolutionary weapon. It caused such a stir that Colt Manufacturing Company of Hartford, Connecticut, arranged a license to produce it as the CAR-15. Military and government agencies including the Air Force Security Police, Secret Service, and FBI bought CAR-15s commercially. The CAR-15's popularity put pressure on the Army and Marines to adopt it as well. By 1966, Colt produced an Army version, the M 16, which was quickly issued to Army and Marine Corps units. It was a mistake.

  The first troops to receive the new weapons were already embroiled in the jungle war of Southeast Asia. But the M16 had a troubled start there, being both loved and despised by the troops. On the plus side, the M 16 was 1.2 Ib/.55 kg lighter than the M 14, and soldiers could carry more ammunition.
Troops also liked having "personal machine guns," and developed the habit of using full-automatic suppressive fire in the close confines of the Vietnamese jungles. This was gratifying-when it worked. But then there was the down side: Almost as soon as the troops switched to the new weapon, they found that the M 16 was prone to jamming and fouling, particularly in the muddy lowlands of South Vietnam. This was not just a minor annoyance. In combat, a jammed weapon will get you killed. Rumors spread among the troops that this was a common occurrence. It was the start of one of the worst ordnance scandals in U.S. military history.

  Congressional investigators later found that the reliability problems resulted both from the way the Army redesigned the CAR-15 into the M 16, and from the way the troops had been trained to maintain it. Against Stoner's advice and Colt's specifications, the Army had substituted a lower-than-recommended grade of propellant in the 5.56mm cartridge used by the M16. This led to fouling and internal corrosion of the weapon. There were also reliability problems with the cartridge primers (the tiny explosive charge struck by the firing pin). The Army had accepted lower-quality standards in machining weapons parts, and it showed. Finally, due to shortages of cleaning kits and lubricants, at least some troops in the field were told, incorrectly, that the M 16 was a "self cleaning" weapon. In fact, the M 16 is a precision machine, requiring regular inspection and cleaning. As a result of Army mismanagement and inept fielding, the reputation of the M 16 was seriously tainted. For a time, Marines in Southeast Asia were reissued their old M 14s, until the Army could fix the M 16.

  Meanwhile, a clean-burning powder was substituted for the inferior propellant, and more reliable primers were produced. In addition, the Army had Colt modify the basic M16 to the M16A1 configuration with a chrome-plated chamber (to avoid fouling) and a stiffer buffer spring to decrease and stabilize the automatic firing rate. The extractor mechanism was also modified, to keep fired cartridges from jamming. And a program of intense training taught troops deployed in the field to properly clean, lubricate, and maintain their M16s. In consequence, the reliability of the M16 improved dramatically, along with the attitude of the soldiers and Marines using it. Eventually, the M16A1 became the standard combat rifle for the U.S. Army and Marine Corps and many allied countries during the late 1960s and 1970s. After its early problems were resolved, the M16A1 developed a solid reputation for performance and reliability. It may not have had the glamor of combat rifles like the H&K-91 or the Israeli Galil, but the M 16A1 did the job during the lean years after Vietnam.

  In the late 1970s the Army began a major update on the M 16. Topping the wish list were a better forward grip, more accurate sights, and an automatic burst limiter to conserve ammunition. Introduced in 1983, the M 16A2 is in use by the U.S. armed forces today. The features added to the A2 were:* A heavier and stiffer barrel, for improved accuracy and reduced wear. In addition, the rifling on the barrel has been optimized for new NATO standard M855/SS 109-type 5.56mm (.223-in.) ammunition used by the M249 Squad Automatic Weapon (SAW). It can also fire earlier M193 5.56mm/.223-in. ammunition without modification to the weapon.

  * A three-round burst limiter, which restricts "automatic" firing to only three shots per trigger pull.

  * A muzzle compensator designed to reduce barrel rise and displacement during automatic firing.

  * A plastic handgrip with a round contour which is tougher and easier to grip.

  * A plastic buttstock that is lighter and tougher than that on the Al model.

  * An improved rear sight deck, with adjustments for range and windage.

  * A modified upper receiver assembly which can be easily adapted to deflect ejected cartridges away from the face of left-handed shooters.

  * Fittings for the new combat bayonet.

  For $624.00 per unit, the M 16A2 is quite a bargain for the American taxpayer, as results from Desert Storm proved.

  The first time you pick up an M 16A2, you are struck with the feeling that you are holding a serious piece of machinery. Weighing 8.8 lb/4 kg, the M16A2 feels good in your hands--well balanced and deadly. It is 39.6 in./100.7 cm long, and consists of four major assemblies:* Lower receiver and buttstock.

  * 5.56mm/.223-in. bolt carrier.

  * Upper receiver and sight.

  * Barrel and forward grip.

  The four assemblies break down quickly for cleaning and maintenance. This is easy to learn, even in the dark with your eyes closed. Keeping the M16A2 clean is vitally important, because the components fit very tightly, and any grit or dirt can easily jam or foul the weapon. The Marine Corps is lavish in supplying cleaning kits, pads, and CLP lubricant/cleaner. You can always tell a seasoned combat Marine, because he will be the one in the group who cleans and lubricates his weapon, even before he eats or sleeps.

  The 5.56mm/.223-in. ammunition feeds from a reusable spring-loaded magazine which is loaded from the bottom of the lower receiver/buttstock assembly. Today, thirty-round units are the standard, but twenty-round magazines are also used. The usual load for a Marine might vary from ten to sixteen of these, though the combat vest only has room for six ready thirty-round magazines. To reload empty magazines you take a supply of 5.56mm/.223-in. ammunition (called "ball rounds"), and methodically insert them one after another into the magazine, being careful not to scratch the cartridges or bend the springs. Snap the magazine into the bottom of the M16A2, and you are ready to go.

  Firing the M 16A2 is very simple. When you're ready to fire, you pull back the T-shaped cocking handle to load the first round into the chamber. Once this is done, you move the firing selector from the Safety position to either the Semi or Auto positions. At this point, you have a live weapon with a round in the chamber. Take aim on the target and pull the trigger. In the Semi setting, you fire one round for every pull of the trigger. If you are using the Auto setting, the M 16A2 will fire a three-round burst every time you squeeze the trigger. The burst limiter was developed after Army researchers found that accuracy fell off rapidly when more than three shots were fired. Also, the tendency for troops to hold down the trigger in "rock and roll" bursts was wasteful of ammunition. Once a magazine is empty, you push the release button to eject the expended magazine, snap another into its place, and are ready to fire again.

  Firing is one thing, but hitting the target is another. The Marine Corps has always prided itself on a tradition of marksmanship, and that tradition continues today with the M16A2. Two new features of the weapon improve its accuracy. The first is a ribbed tubular foregrip (replacing the "Mattel Toy" grips of earlier models). The second is a new sight deck and sight, which makes it easier to put rounds onto a target. You simply turn a dial to the required range setting, align the forward bead with the rear sights, and fire. If you have properly compensated for wind or temperature variations (which they teach you), the rounds should be hitting the targets with regularity. The Corps requires that Marines be able to hit targets with accuracy (50% or more of the rounds fired for hits) at 200, 300, and 500 yards/ 182.9, 274.3, and 457.25 meters, from a variety of firing position and postures. By comparison, the U.S. Army qualifies basic recruits at 100 yards only. Take it from me. Hitting targets at 100 yards/91.4 meters is easy. Although Marine recruits are taught to fire automatic, three-round bursts, single-shot firing is emphasized. Economy of ammunition is a key factor. When you fire in the burst mode, the muzzle tends to climb up, due to recoil, so only your first and second rounds will usually be on target. One way to avoid this is to steady the weapon against a tree or rock.

  The M16A2 is probably the most accurate combat rifle in general service today. In fact, the Army competition shooting team recently moved from the M 14 to a modified M 16. One variant being procured today is the M-4 short-barreled carbine, with a folding stock. This weapon, identical to the M 16A2 in performance, but smaller and lighter, is issued to vehicle and helicopter crews and support and service units, where space and weight are at a premium. The shorter barrel creates louder noise and a slightly different balance. The Marines are p
rocuring over ten thousand of these handy little weapons from Colt. New kinds of ammunition being considered include a tungsten-cored armor piercing 5.56mm/.223-in. round from Sweden. In 1996, the M 16 entered its third decade as the primary combat rifle of the U.S. armed forces. Continuous improvements and variants will keep this classic weapon lethal into the 21st century.

  Another major development is night sights, to make the M16 more capable in darkness or bad weather. The Marines already have the AN/PVS-4 light-intensification sight for the M16, but they are rapidly developing and fielding newer systems. For instance, a new night fighting/spotting system, the PAC-4C, utilizes a special shoulder sling and red laser dot. But what Marines (especially reconnaissance and scouting units) really want is a thermal-imaging sight. The Marines have already adapted the thermal-imaging sight from the man-portable Stinger surface-to-air missile (SAM), though it is a bulky, expensive device which drains batteries rapidly. Both the Marine Corps and the Army are evaluating the NiteSight, a miniature thermal sight from Texas Instruments (TI). Small and lightweight, it draws much less power than earlier thermal sights. The key is a TI-designed imaging system. Unlike most thermal sights, it does not have to be chilled far below zero. Because it functions at 70deg F/21 C, size and cost are greatly reduced. TI has plans to adapt NiteSight for motor vehicles and commercial aircraft.