The Bullet vs. Ballistic Armor Contest
X-Ray Sniper Scope
X-ray scopes mounted to sniper rifles have seen in popular media since at least 1996's Eraser when an 'x-ray scope' was amounted to the handheld EM-1 railgun. And it seems like a good theory, x-rays allow you to the person behind cover, and then supercharge your gun and blow them away.
Sounds good, but it is not possible. I've worked in a ICU for ten years, and most x-ray done in the room are done with massive machines on wheels like the one in the picture. While smaller x-ray machines are possible, dental scanners, and some new technology coming down the pipe, but nothing that would allow one to mount them to an M14. And besides, x-rays are the wrong technology. Thermal is much better and current technology, x-rays require close proximity to be effective, something like a snake-cam would be a better example of use of handheld x-ray technology to view through walls.
The 'Gecko' Climbing Nano-Gloves
The Flying Squirrel Suit
The TITUS-6 Flechette Launcher
Laser Defensive Turrets
The Storm PSR Sniper Rifle
According to the writing on the side of this next-gen sniper rifle, the 'Storm PSR' utilizes the electronic launching system used by Metal Storm weapons. The ability of this sniper rifle is two-fold. One is to fire different types of rounds via the same barrel, similar to the Metal Storm weapons, and the electronic firing system can be modified to fit the tactical situation. Got a tango behind a wall? No sweat! Charge the electric firing system to maximum and fire that sabot through the rock and kill that mother fucker! At the moment, this technology is fictional...there is no Storm PSR. And it is unlikely that the Metal Storm company will be around in 2025...they are already bankrupt.
The 'Taser' Galvaknuckles
In most of the 2025 levels, but not online, the player will melee with a set of futuristic brass knuckles that seem to shock the hostile dead or just out...sort of the Black Ops: II Vulcan Nerve Pinch. Taser knuckles do exist, and you can buy them for self-defense, and they would make a cool less-than-lethal system...but could they kill? Yes, if set high enough, you could shock someone to death, and unlike a knife or tomahawk, the first blow would be the last. Rumors state that SOF prison grab operations have the operators outfitted with weapons like this.
The Silent Guardian System
Microwaves are just great for nuking popcorn and meatloaf, but also for driving off the bad guys and angry mobs. In military lingo, it is called 'active denial system' and it is a non-lethal DEW system, normally mounted on vehicles for breaking crowds and denying access to an area, like a FOB. These are a reality and appear in Black Ops: II has a killstreak reward and does damage the longer someone is in range of the microwave heat-ray. Large scale application of this technology has been slowed by protest and they were pulled from duty in A-Stan in 2010.
The Target Finder Gun Slight
Okay...how the hell does this thing work? How does the tiny computer inside of the scope process the data to determine if a person is hostile? Does it read their minds like in Minority Report? My only guess is that the scope uses the user's local network to scan the area, and any that are using a known enemy signal are deemed hostile. This is most likely a completely fictional piece of next-gen technology.
Unmanned Armed Ground Vehicle (UAGV
These AGRs are similar to the real-world UGVs under developed, which are tracked and armed with a LMG. These are not fully part of the US Military, but it is believed that within a few years, armed UGVs will be the norm.
Unmanned Combat Air System (UCAS)
The Hypersonic (MACH 7+) Cruise Missile
Active Camouflage Suits
Science fiction has always wanted to design a invisibility suit, and have been the stuff of ancient lore, but today, we seem to be one of the edge of this being a real technological marvel.
Games like Black Ops: II and Ghost Recon: Future Soldier feature invisibility materiel, making them close to the Predator. One company, Hyper Stealth Biotechnology has working prototypes of material that can mimic the local surrounds, making the wear 'invisible'. This bending light metamaterials is so effective that it even renders the wearer invisible to NVDs. The company has said that the US and Canadian governments are taking the technology to the next level. There were rumors, fueled by an unusual video from Iraq, that the US military has these suits already in combat. Here that is that video: