In an era where Pentagon is retiring younger weapons systems, such as the F-117 Nighthawk (the stealth fighter), the M16 family of rifles continues on. Much like the B-52 bomber, which began active duty in 1954, the weapon is either too good to replace or there is simply nothing that can do its job better. For better or worse, the M16 -- particularly its shortened M4 variant -- will be the rifle of choice for most US soldiers for years to come.
An enduring icon of America's political and military aspirations
The M16 and its Soviet-designed counterpart, the AK-47, are iconic symbols of America and its enemies' political and military struggles. US soldiers armed with M16s faced the massive Red Army of the Soviet Union and its AK-47-equipped troops. In Vietnam, US soldiers with M16s fought Viet Cong insurgents and North Vietnamese forces who were often armed with AK variants. In numerous smaller proxy confrontations, US-backed and M16-equipped forces battled AK wielding forces supported by the Soviets.
While the Cold War came to an end with the collapse of the Soviet Union in the early 1990s, the iconic battle of rifles continues as US troops with M16s battled the AK-armed Iraq forces in the first and second Gulf War. Today, the various Iraq insurgent elements, the Taliban remnants in Afghanistan, and a variety of other terrorist groups, such as al Qaeda and Hezbollah, most often aim their AKs at US forces who fire back with M16 and the increasingly-deployed M4 carbine version (a carbine is a shorter rifle that was originally designed for cavalry troops).
A rocky start that has never been entirely forgotten
In June of 1996, the New York Times published an article entitled "Army Seeks a Rifle to Replace the M-14, Found Erratic in Vietnam Fighting" that discussed how the US Army was attempting to deliver a more modern rifle to the bulk of its soldiers. The article noted that the decision "... could well shape the course of land battles for some time to come." While the M16 would in fact go on to replace the M14, its introduction into widespread service was not positive.
A PR disaster in its first year and still generating some bad press
The M16 began its long service mired in controversy. Initial batches were prone to jam during use in the jungles of Vietnam. In 1967 the M16 had become a standard Army weapon, but that same year frequent reports of the rifle malfunctioning -- and graphic anecdotes recounted in Congress and in the media of dead US soldiers with jammed and inoperable weapons in their hands -- led to a far-ranging discussion on the weapon's merits. A Congressional delegation was sent to Vietnam while military leaders defended its value to critical lawmakers.
While the kinks were largely worked out -- its internals were treated differently, better ammunition was issued, and soldiers were taught to clean it frequently -- the weapon has never been able to shake the reputation of a finicky rifle. In March, the Army Times published an article entitled "Better than M4, but you can’t have one." [Note: The M4 is a shorter version of the M16 but relies on mostly the same internal parts.] The article pointed out two recent and well-known examples of the M16/M4 failing in combat in Afghanistan and Iraq.
Once behind cover, Self tried to fire again, but his weapon jammed ... The Rangers were fighting for their lives. Self left his covered position and ran under machine-gun fire to search for a working weapon. [2002 battle in Afghanistan]
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Perhaps the most well-known incident of M16s failing in battle involves the 507th Maintenance Company in 2003 during the opening days of the ground invasion of Iraq ... Several of the 507th soldiers later complained that their M16s, and other weapons, failed them during the March 23 ambush. [2003 ambush in Iraq]
While those two high-profile reports of M16/M4 failures would seem to indicate the rifle is flawed and should be replaced or redesigned, the leadership in the Pentagon apparently does not agree. It is buying even more M16s/M4s today, despite decisions by US special force units that are already using or planning to move to a different and more reliable rifle (these small, elite units can choose their own weapons, unlike the majority of Army soldiers and Marines who are issued the standard rifle).
Rigorous scientific testing would undoubtedly prove whether or not these reliability stereotypes are accurate, but the Army Times article notes that multi-service analysis, reports, and leadership comments seem to argue both viewpoints. No matter what the experts say, the sand, grit, and dirt of Afghanistan and Iraq; the prolonged combat operations in these theaters; the use of M16/M4 rifles by less well trained support troops; and the ever-present comparison of the rifle's reliability to the very reliable AK-47 keeps fueling the debate about replacing the venerable and iconic M16 platform.
Is there something better, and if so, why don't American mainstream troops -- not just special forces units -- get it right away? To understand the answer to that question, it's important to know just how the M16 came to be adopted in the first place.
The standard US rifle reflects the military's view of the state of modern conflict
Over the last century, US soldiers primarily relied on four rifle families. In World War I, troops used the .30 caliber Springfield M1903 rifle (caliber is the diameter of the inside of a rifle's barrel, measured in tenths of an inch or millimeters; rifling is the twisting grooves inside the barrel that spin the bullet as it is propelled forward to make it more accurate). The Springfield was very accurate at long distances. It fired a single shot with each trigger pull. To fire again, the soldier was required to manually reload the weapon from its internal magazine, just like with many common hunting rifles today (this system is usually described as "bolt-action").
In World War II, US forces transitioned to the .30 caliber M1 Garand rifle. It was also accurate, but it featured semi-automatic operation. It would automatically fire with each trigger pull (no need to manually operate its "action") until the internal magazine was empty. It enabled a single rifleman to deliver a much higher rate of fire than many enemy forces that were still relying on bolt-action rifles.
Following the war, the US and Soviets both examined data from infantry engagements to come to the same conclusion: The typical soldier would be better suited with an assault rifle, a lighter, shorter weapon that could fire at a much higher rate (automatic fire means the weapon will continue to fire until the soldier releases the trigger or the ammunition runs out). As a result, the Soviets developed the AK-47. It was not that accurate but was very durable, easy to produce, and easy to operate by less-well trained forces (these comments are all relative and somewhat subjective comparisons to the M16 and US troop training). The AK-47 is a .30 caliber weapon (but with a less powerful round than previous .30 caliber bolt-action rifles), though its caliber is usually noted by its metric measurement, 7.62mm.
In Korea, US troops still relied on WWII-era rifles, but the military was trying to field its own assault rifle. What resulted was the short-lived M14 (short-lived as a standard rifle; it lives on today as a sniper rifle). It looked like a Garand with a magazine box protruding out the bottom. However, it did not live up to expectations according to the reports of US troops using it in Vietnam. It was heavy, and its 7.62mm rounds (not the same as the Soviet version of the same caliber) were also heavy and therefore limited the amount of total ammunition a soldier could carry in the field. Another problem was that it was nearly uncontrollable in automatic mode.
As a result, some in the Pentagon were aggressively searching for a more radical, modern option. In research that is still hotly debated, many in the Pentagon concluded that a smaller caliber but high energy bullet would be as lethal as a larger diameter bullet. It's often a shock for many to realize that the caliber chosen for what would become the M16 was just .223 inches, just a tad bit larger than the .22 caliber bullets used in numerous low-power sport and hunting rifles in the US (the round is much more powerful, though). But while small in diameter, a major benefit of the smaller caliber ammunition was that it was lighter. Troops could carry more magazines.
The AR-15 design selected by the Pentagon in the 1960s as the future main US rifle also relied on lightweight materials for its stock (the rear of the weapon), pistol grip, and front hand guard, further reducing the overall weight a soldier was asked to bear. The integrated carrying handle and elevated front sight gave the weapon its distinctive profile. All of these design elements resulted in an automatic rifle -- which was designated the M16 when it was officially deployed -- that was light, accurate, and much more controllable in automatic mode than the M14.
The M4 is the preferred M16 variant today
Today, the Army is increasingly employing the M4. This version of the M16 is shorter and lighter and is more suited for the types of use the Army faces currently and envisions in the future. An Army postion statement from March noted that:
The M4 Carbine is the Army's primary individual combat rifle for Infantry, Ranger, and Special Operations forces. Since its introduction in 1991, the M4 carbine has proven its worth on the battlefield because it is accurate, easy to shoot and maintain. The M4's collapsible stock and shortened barrel make it ideal for Soldiers operating in vehicles or within the confines associated with urban terrain.The statement goes on to note that "The M4 is the highest-rated weapon by Soldiers in combat" and "The Army has approximately 225,000 M4/M4A1 carbines in the inventory, with more procurement programmed." This effort to acquire more M4s is part of the Army's multi-billion effort to equip and reset its troops.
While the Army is more aggressive in adopting the M4, even the Marines are using it in many activities. A 2004 Marine Corps News article highlighted this change:
Today's changing face of American war and the global war on terrorism have inspired the military to adapt its tactics, affecting the distribution of firearms to troops, including Marines serving in the Operating Forces. The effect has resulted in a trend to equip special operators, security forces and noninfantry service members with a more handy, versatile and compact weapon [the M4] without sacrificing firepower.
Perhaps one of the most important reasons the M16 family remains viable today has nothing to do with its core design, but rather the recent adoption of a standardized attachment method called the Picatinny rail system. Named after the military R&D center that created it, the NATO-standard, grooved system enables soldiers to adapt the latest generation M16s and M4s to mission needs (and their personal preferences when applicable). The vertical handles, modern sights, and flashlights (tactical lights) that are common on most rifles in use -- and pictured above -- are all attached using Picatinny rails.
Choosing a rifle: The best doesn't always win
Deploying a new rifle is not a simple matter of finding and buying the best weapon available. The history of US military small arms is littered with fascinating stories of how various weapons eventually made their way into and out of the arsenal. Interesting enough, the M4 carbine is replacing a variety of weapons including the World War II vintage M3 "grease guns" that have deployed with US soldiers since the early 1940s. When compared to an M3, even a B-52 bomber is a youngster!
Time to replace the M16/M4?
Should the M16 family of weapons be replaced before its 50th anniversary? As mentioned previously, there is not a consensus within the Pentagon. For those who want to replace the weapon, the two main reasons for ditching the M16/M4 are:
- It is not as reliable as it could be. The AK is often the yardstick used to measure the reliability of the M16/M4, but other modern firearms are also believed to be more reliable. As we have seen, the perception of jam issues never goes away. While the most obvious problems were ironed out in the late 1960s, the fine sands of Iraq demonstrate that the M16 internal design will malfunction. The malfunctions stem from the basic design of the weapon -- gas from each round fired is sent back into the weapon to operate its action, leading to corrosion. Competing systems, such as the AK family, rely on the gas to push a piston rod that interacts with the action, reducing direct exposure to the gas and therefore corrosion.
- Its caliber is too small. A hotly debated topic among actual and arm chair soldiers is the .223 (5.56mm) caliber bullets used by the M16 family of rifles. Detractors say it does not have enough stopping power at close range (it won't knock an enemy down like a bigger, more powerful bullet) and that it is not accurate at longer ranges.
But those who want to retain the M16 family counter that:
- The weapon is reliable when cared for properly. The Pentagon leadership claims that the M16 is not prone to failure if kept clean. The Army Times article noted a variety of reports and data that said the weapon was, in fact, reliable.
- The caliber is effective and would be too much trouble to change. There are still plenty who believe that a small caliber, high velocity bullet is effective. In addition, others argue that changing the caliber would be a massive logistical nightmare as there are huge quantities of the ammunition in active, reserve, and National Guard, as well as NATO, arsenals. Related to this, many say that NATO allies will not be eager to change caliber after being pressured to adopt it in the first place (NATO had standardized on 7.62mm rifle ammunition previously).
- Replacing the rifle would cost too much, particularly in the current environment. Replacing the rifle would require buying new weapons (and perhaps new ammunition if the caliber is changed). But that would not be the only cost. Armorers would have to become proficient in the new and old weapons, and soldiers would be required to master both the M16 and new rifles during the transition. The Army Times article noted that while M4 packages cost on average about $1,300 currently, the cost of replacing M16/M4 weapons would be very expensive: "Experts say it would cost approximately $1 billion to replace the Army’s M16s and M4s with an 'off-the-shelf' weapon ..."
Other political issues would almost certainly come in to play, although they may not be officially discussed by military leaders. For example, the AR-15, the basis for the M16, was an American design. Already, the military is using weapons designed in other nations, including the M249 Squad Assault Weapon and the M9 pistol. If a foreign design is chosen, it would be another blow to US design and manufacturing even in the likelihood that the winning vendor would manufacture the new rifle in the US. The history of weapons procurement is riddled with Congressional and industry interference, and the choice of a new rifle would be no different.
Close, but no cigar for the XM8
The most recent threat to the M16 family came from the XM8 rifle. Originally a modular piece of a complicated smart weapons system, the XM8 was close to being fielded as a replacement for M16-type rifles. However, at the last minute (in military procurement time), the project was canceled in late 2005. Speculation is that competing weapons vendors and politicians in states with either existing or potential rifle plants scuttled the project just as it was about to enter large-scale testing with active duty troops.
Other options, such as replacing the core gas tube mechanism that is blamed for limiting the M16/M4's reliability with a piston-based system, such as with the HK416 system preferred by some US special forces units, have gained little traction.
Happy 50th ... most likely
While the American soldier may have a simple need -- the best and most effective rifle -- the reality is that whatever eventually replaces the M16/M4 will have to clear many hurdles that are not about what is best for the person who will rely on it, but what makes sense to Congressmen, global arms vendors, and others with millions of lobbying dollars.
For now, it looks like the US military, as well as graphic artists, Hollywood directors, and the media will continue to rely on the M16/M4 as the main rifle and primary image of the American military.






