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Smart Bombs: Military, Defense and National Security

ARCAS: Could The Army Soon Merge An M4 Rifle And A Computer?

A shell casing flies out with a trail of smoke as U.S. Army Pfc. Michael Freise fires an M-4 rifle during a reflex firing exercise at the Rodriguez Live Fire Complex, Republic of Korea, on March 23, 2005. Freise is attached to the 1st Battalion, 72nd Armor Regiment, which is taking part in exercises Reception, Staging, Onward movement, and Integration/Foal Eagle. The annual, multi-phase exercise is tailored to train, test, and demonstrate U.S. and Republic of Korea force projection and deployment capabilities.

How would you like a powerful computer mounted on your M4 carbine? That’s what U.S. Army soldiers are now testing. This gem would give valuable intelligence about the target you are aiming at. The system features a video augmented reality feature connected to a heads-up display to change the way weapons are aimed.

ARCAS Is Here 

The Assault Rifle Combat Application System or ARCAS is from Israeli contractor Elbit Systems. It replicates first-person shooter video games for a better situational awareness system attached to soldiers’ rifles. Its artificial intelligence talks to the M4’s electro-optical sight. Elbit calls this system a “digital, networked combat machine.”

ARCAS uses a video camera to give soldiers more information about targets, such as the range and how the shooter needs to correct his or her shot. ARCAS has built-in maps to enable soldiers to conduct their own intelligence, surveillance, and reconnaissance. The system also allows soldiers to talk to their squad and platoon leaders through the rifle.

Augmented Reality Heads-Up Display on M4s

ARCAS tracks the number of rounds available in the heads-up display and could even determine who are friendlies and who are enemies. It also lets you comminate with other soldiers through wi-fi or Bluetooth. “Zeroing” the weapon, or setting up and adjusting the sight, is done automatically. ARCAS also tells you if there is a malfunction or jam in the M4. ARCAS will have future updates to the software to improve performance. Through motion detection, ARCAS can track, identify and recognize a target at a maximum of 580 meters, so it is meant for more close-quarters combat.

There Could Be Issues With Such an Advanced System

This all sounds amazing, but there are practical problems.

What if a new private comes to an infantry unit after learning to shoot a certain way with existing sight configurations in Basic Combat Training and Advanced Individual Training? He would have to learn to shoot all over again with a complex system.

It is not clear how much the system weighs and how durable it is. What if sand or dirt gets in ARCAS? Could the entire system crash in combat? What if personnel dropped it on the ground? It seems delicate. Soldiers would then have a rifle that is combat ineffective. Could personnel remove the system and install iron sights in the heat of combat? That’s not clear from the manufacturer. Plus, there are batteries to think about. One of the biggest difficulties with complicated aiming systems is simply remembering to pack extra batteries.

More Features More Problems

The contractor claims it can shoot around corners without explaining how that would work and that ARCAS allows shooting from the hip with newfound accuracy. Maybe ARCAS has what Silicon Valley calls feature creep. That’s too many features without getting user feedback. It would make more sense to focus on one aspect of the system and then innovate new features as soldiers call for them. This would allow the manufacturer to slowly integrate features after each iteration. This could be done in phases of development.

Aside from these downsides, you have to admit that ARCAS is the future. Heads-up displays, augmented reality, and video cameras are all innovations that will eventually come to rifles. ARCAS just has to slow down and get more feedback from users before the Army fields the weapon.

1945’s new Defense and National Security Editor, Brent M. Eastwood, PhD, is the author of Humans, Machines, and Data: Future Trends in Warfare. He is an Emerging Threats expert and former U.S. Army Infantry officer.

Written By

Now serving as 1945s New Defense and National Security Editor, Brent M. Eastwood, PhD, is the author of Humans, Machines, and Data: Future Trends in Warfare. He is an Emerging Threats expert and former U.S. Army Infantry officer.



  1. Michael Byrd=Hero,Babbit=DeadSlut

    October 23, 2021 at 11:51 am

    A useless upgrade when the NGSW is right around the corner.

  2. Cwolf

    October 24, 2021 at 9:26 am

    Tracking Point et al has been around for decades.

    Obviously the BOIP drives costs. Good tool for Infantry or even SDM. Not cost-effective for many other MOS.

    Focusing exclusively on aiming-shooting misses a key variable…. Locating the target behind obscurants/foliage.

  3. Ed

    October 24, 2021 at 1:22 pm

    I am old fashioned but I hope the Expert Badges and re-quals remain requirements using iron sights…OK, and no-power scopes. Batteries run out and EMP’s are a battlefield reality or soon will be; so is jamming of mil GPS and knocking out satellites. What is the old saying, it always comes down to muddy boots and smelly uniforms in the end.

  4. Rick

    October 24, 2021 at 1:43 pm

    With large leaps in technology (and small ones like “here’s your new, much larger rucksack”)such as this, infantry veterans HOPE that the smart guys at Higher Niner test, retest, and confirm the new toys before pushing them out to the Dirt Techs who will end up using them in places far, far away from the people who chose, purchased and issued them.

    This is one has so many potential issues: how heavy is it, how durable is it, what are the ergonomics changes to mounting and firing the rifle, failure rate of the electronics in battlefield conditions, how dependent on integrated technologies like Bluetooth and GPS, etc.

    Even something as simple as “here’s your new, bigger volume rucksack” can have unintended consequences. Seemed like a great idea to fix the problem of just barely having enough room and having to decide how many spare pairs of socks to bring, etc. But then you have commanders that decide that bigger rucksacks mean they can now give the troops more heavy stuff to hump – troops that are already humping ridiculous weight.

    In short, the field soldier in a battle environment is not the place to discover the faults in new kit. This piece of kit, with such an enormous technological leap forward (if it actually is)has many, many points of potential failure.

    Not opposed to tech changes – the optical, red dot, and laser designators were a huge game changer – but kit like this really, really needs to be tested and wrung out hard before becoming general issue.

  5. Gen. Woketater

    October 24, 2021 at 9:12 pm

    The primary task of our new progressive military is fighting climate change, for which solar-electricity-rechargeable weapons will be an important tool to terminate domestic terrorists using fossil fuels in their vehicles (non-VIPs). Another advantage is the collateral damage has less carbon footprint than a drone strike.

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