The Russian suit, Ratnik-3, is an imposing web of hexagonal armor plates, black webbing, and small joint motors called actuators. Oleg Faustov, an engineer working with weapons maker TsNiiTochMash, told Russian media outlet TASS this week that the government had already tested a prototype.

“It really enhances a serviceman’s physical abilities. For example, the tester was able to shoot from a machine-gun only with one hand and accurately hit targets,” he said at Russia’s recent Army-2018 weapons show.

As part of the Army-2018 publicity push, the makers of the suit also made vague and unverifiable claims that it had seen actual combat, according to Sam Bendett, an associate research analyst at CNA and a fellow in Russia studies at the American Foreign Policy Council. “It was interesting that the Russian announcement during Army-2018 stated that the exoskeleton was ‘tested in combat,’ though without any specific details. It's likely that it was tried in Syria, though the press and media did not cover that development,” he said. While the statement came from the suit’s maker, Bendett said he assumes the claim “had to be approved by the state given the combat claims.” The suit is supposed be officially released in 2025.

In addition to an almost comically Black Manta-esque helmet, the Ratnik-3 features “40 life-saving elements,” Russian media says. In many ways, it resembles some of the more recent concept images of the TALOS suit that U.S. Special Operations Forces Command, or SOCOM, is attempting to develop.

In both, all those bells and whistles seem to be an obstacle to the suit reaching full utility. Both the Ratnik-3 and TALOS efforts seem constrained by available power. “There are issues with the battery and energy sources for this exoskeleton, as Russia—along with other nations working on this—are trying to create a compact energy source that would allow the soldiers to act independent of any stationary or vehicle-borne sources of energy,” Bendett said. Even Russian media have noted the suit’s power constraints, noting that a battery life of less than four hours isn’t super practical for a day of marching.

A forthcoming series of reports from the Center for New American Security, or CNA, takes a deep dive into the issue of soldier augmentation and reaches a similar conclusion.

“The current state of technology still does not have sufficient power to manage the intense load-carrying capacity that the SOCOM TALOS suit concept requires...and development is needed before full-body exoskeletons will be feasible for infantry combat away from a reliable power source. Still, these advances represent a major step forward in the necessary technology for dismounted soldier exoskeletons,” notes the report.

While size and power constraints are hindering the realization of militaries’ most ambitious Iron Man dreams, more modest exoskeleton suits are moving closer to real-world use. The U.S. Army is experimenting with two exoskeleton designs at the Natick Soldier Systems Center in Massachusetts. These won’t protect soldiers from enemy fire but they will help soldiers carry more stuff for longer. And they’ll likely be on the battlefield far sooner.

“Exoskeletons with more modest goals, such as lower-body exoskeletons that are designed simply to increase mobility, reduce energy expenditure, and reduce musculoskeletal injuries, may show more promise in the near-term,” according to the CNAS report.

The larger of the two is the ONYX from Lockheed Martin. At a Pentagon event in May, Defense One caught up with Keith Maxwell, a product manager from Lockheed Martin, who described the results of initial tests in November, 2016.