Since the first person shooter (FPS) genre's inception, there have been games that try to mimic the actual conditions of real warfare. In games like Halo and Half-Life, you're augmented with a hefty amount of health or personal shield, but they make the virtual battles feel and act as realistic as possible. Arguably the most well-known franchise in this subgenre of FPS games is the long-standing SOCOM series, which has been around since 2002. Since the first game, the series has continued to be one of the premier sources for realistic FPS gaming that requires players to be strategic and quick thinking during combat.
It's a common practice for shooter games to take weapons from the real world. If you look at any FPS, whether it's Call of Duty, Medal of Honor, Goldeneye, or Battlefield, there are going to be some guns that have been based on, or recreated from real world counterparts. Many games have a healthy mix of real-world weaponry, experimental technology (especially in games set in the near future like Crysis 2), and/or alien gadgets like what's found in the Gears of War or Halo series.
Unlike many of its competitors, the SOCOM series exclusively uses guns that exist in the world. SOCOM has always had a large arsenal of weapons that include many different guns from each of the main categories (handguns, machine guns, rifles, explosives, etc.). Many of these are well-known, even iconic weapons like the Desert Eagle magnum, Beretta pistol, AK-47 machine gun, Dragunov sniper rifle, and RPG-7 rocket launcher. Look at the arsenal from last year's SOCOM: U.S. Navy SEALs Fireteam Bravo 3, which had over fifty different weapons; every one of them were taken from the real world. If you're a fan of shooters, there's a good chance you've used at least a few of the weapons SOCOM has to offer.
The SOCOM series has never had a strong focus on vehicular combat. A few installments have experimented with it, but as a whole the franchise is primarily about tough, in-your-face situations that you and your squad have to overcome (much like real-world combat tactics). Some of the vehicle's past games have included the M1045, M1114 and M1025 (well-armed Humvees), ALSV (Advanced Light Strike Vehicles – think fancy ATV), CRRC & SOC-R (water transport), and, of course, the Bradley and T-72 tanks. These are just a few of the vehicles found in the series. All of them can be found in real life, and many of them are still used today.