The US Army is searching for a new combat vehicle to defeat the toughest adversaries - here are 3 leading possibilities

There are 15 variants of the Combat Vehicle (CV) 90 in service in seven nations, so BAE Systems is coming to the table with the latest iteration of a proven vehicle. "We're pretty proud of this vehicle," a spokesman for the company told Business Insider at AUSA. "We brought this as our best way to start a conversation with the Army and help the Army help us figure out what it is that soldiers need."

The strengths of this vehicle, according to its makers, include its growth potential and the mission-specific modularity and flexibility.

"On the left and right sides of it are boxes, they look like they are bolted on, those are weapons station modules," the spokesman explained, "On [the left] side, you have a Spike missile module connected to the vehicle, and on the right side, you have a 7.62 coaxial machine gun with 2,000 ready rounds in the box."

Those modular systems are all on attachment points, meaning that they could be swapped out for other modules, such as a Mark 19 grenade launcher, to suit the mission at hand. "It gives the Army, the unit commander, and the vehicle commander the maximum flexibility they need based on the mission," he said, calling it "sexy."

In addition to this flexibility, there is also growth potential in the vehicle weight. The vehicle has a maximum weight of 40 tons. The floor model weighed around 30 tons, allowing for the addition of extra armor and weapons systems should the intended mission require these modifications.

The vehicle's 35 mm cannon can be easily modified should the Army show an interest in a 50 mm main gun, something Col. Jim Schirmer, the project lead for the NGVC, told reporters Tuesday that the Army is seriously considering.

The BAE Systems vehicle also features a drive-by-wire system for manned and unmanned missions, advanced data transfer capabilities, enhanced survivability as it sits low to the ground (hard to see, hard to hit), advanced 360 surveillance, smart targeting systems, airburst munitions for counter-drone warfare, and active protection systems that can be modified as the Army presents a clearer picture of what it expects.

Described as a "not business as usual" project, the Lynx KF 41 Infantry Fighting Vehicle is the byproduct of a partnership between Rheinmetall, which has an extensive knowledge of vehicles, and Raytheon, a company that excels at integrated electronic systems.

The Raytheon team emphasized modularity for mission-specific modifications in a brief discussion with BI on the floor at AUSA 2018. "The whole thing is very innovative. You can take this configuration, remove the top, make it into another configuration, and you can do that overnight," Kim Ernzen, vice president of Land Warfare Systems at Raytheon, explained.

"With a 10-ton crane, you can lift the roof plate and the turret off the base chassis, and you can re-roll the vehicle," Philip Tomio, the vice president of strategy and marketing for the Vehicle Systems Division at Rheinmetall, said. "You can turn it into a command post, an ambulance, a repair and recovery vehicle, a joint fires reconnaissance variant. You have a number of options."

She revealed to BI that during recent trials, crews were able to change the configuration in roughly three hours.

The survivability of the vehicle can be changed in accordance with the demands of the fighting environment. With roughly 20 tons of configurable payload, the chassis can support additions up to 55 tons for high-intensity combat against an adversary like the Russians. And the main gun can be modified from a 35 mm cannon to a 50 mm gun as needed.

The Lynx IFV supports up to nine dismounts with a three-man crew, as well as as next-generation thermal sights, Coyote unmanned aircraft, active protection systems to counter a variety of asymmetric threats, a fully-integrated situational awareness sensor suite, and an extended-range TOW missile system, among other features.

The spokespeople for this OMFV project repeatedly stressed that the Lynx would be manufactured in the US, supporting the US industrial base and creating jobs. But perhaps more importantly, the vehicle is a finished product, not a concept, that could be ready to go on a moment's notice.

Produced by the company the makes the M1 Abrams tank, also slated for replacement, General Dynamics' Griffin III features lethality, modularity, and growth options, among other capabilities.

In terms of lethality, the modular turret features a 50 mm main gun with the option to modify the weapon to a 30 mm cannon if necessary and the ability to fire at an 85 degree angle, a capability requested by the Army for urban combat. The 50 mm gun is significantly more powerful than the Bradley's current 25 mm cannon.

Supporting a squad with five to eight people and a two-to-three-man crew, the newest evolution of the Griffin I and II is, according to General Dynamics, focused on "adaptability" through the company's emphasis on a modifiable, open architecture. At the same time, the vehicle features a wide variety of integrated systems with a common operating system, specifically active protection systems, laser warning systems, 360-degree surround view, and a deepstrike package, Mike Peck, the director of enterprise business development at General Dynamics told BI at AUSA 2018.

"All of that is integrated in there. You don't have to keep adding boxes to the vehicle," he explained.

The Griffin III is meant to satisfy the Army's vague requirements for the OMFV as they are right now, but it could be changed.

"We wanted to show them what they asked for and then ask, 'Do you like it, or would you change something?'" Peck explained to BI. "If so, the next iteration — Griffin IV — will have those modifications on it."