M1911 pistol
The M1911 is a .45 caliber sidearm that the Army has used since World War I, and has even begun phasing out.
M9 pistol
The Army started replacing the M1911 with the 9mm M9 in the mid-1980s.
M11 pistol
The M11 is another 9mm pistol that replaced the M1911, and is itself being replaced by the M17 and M18 pistols.
M500 shotgun
The M500 is a 12-gauge shotgun that usually comes with a five-round capacity tube. The Army began issuing shotguns to soldiers during World War I to help clear trenches, and has been issuing the M500 since the 1980s.
next slide will load in 15 secondsSkip AdSkip AdM590 shotgun
The 12-gauge M590 is very similar to the M500 — both of which are made by Mossberg — except for little specifications, such as triggers, barrel length and so forth.
M26 modular shotgun accessory
The M26 is "basically a secondary weapon slung underneath an M4 to allow the operator to switch between 5.56 and 12-gauge rounds quickly without taking his eyes off the target or his hands off of his rifle," according to the US Army.
M14 enhanced battle rifle
The M14, which shoots a 7.62mm round, has been heavily criticized, and the Army is currently phasing it out. Read more about that here.
M4 carbine
The M4 shoots 5.56mm rounds and is a shortened version of the M16A2.
M16A2 rifle
The M16A2 shoots the same round and has a similar muzzle velocity as the M4. One of the main differences, though, is that it has a longer barrel length.
next slide will load in 15 secondsSkip AdSkip AdM16 rifle with M203 grenade launcher
The M203 shoots 40mm grenades and can be fitted under the M4 and M16, but the Army is currently phasing it out for the M320.
M249 squad automatic weapon
The SAW shoots a 5.56mm round like the M4 and M16, but it's heavier and has a greater muzzle velocity and firing range.
M240B medium machine gun.
The M240B is a belt-fed machine gun that shoots 7.62mm rounds, but is even heavier and has a greater max range than the SAW.
There are multiple versions of the M240, and two more of those versions are Army standard issue.
M240L medium machine gun
The M240L is a much lighter version of the M240B, weighing 22.3 pounds, versus the 240B's 27.1 pounds.
M240H medium machine gun
The M240H is an upgraded version of the M240D, which can be mounted on vehicles and aircraft.
next slide will load in 15 secondsSkip AdSkip AdM110 semi-automatic sniper system
The M110 shoots a 7.62x51mm round with an effective firing range of more than 2,600 feet. But the Army is currently phasing it out for the Heckler & Koch G28.
M2010 enhanced sniper rifle
The M2010 shoots a .30 caliber, or 7.62x67mm round with an even greater effective firing range than the M110 at nearly 4,000 feet.
M107 long-range sniper rifle
The M107 shoots an incredibly large 12.7x99mm round with an equally incredibly large effective firing range of more than 6,500 feet.
M2 machine gun
The M2 shoots .50 caliber rounds with an effective firing range of more than 22,000 feet. It's also very heavy, weighing 84 pounds.
M320 grenade launcher (stand-alone)
The M320 is the Army's new 40mm grenade launcher, which can be fitted under a rifle or used as a stand-alone launcher. The M203 could too, but rarely was.
The M320 reportedly is more accurate and has niftier features, like side-loading mechanisms and better grips.
next slide will load in 15 secondsSkip AdSkip AdMK19 grenade machine gun
The MK19 is a 40mm automatic grenade launcher that can mount on tripods and armored vehicles. It has an effective firing range of more than 7,000 feet, compared to the M320's 1,100 feet.
M3 Carl Gustaf (MAAWS)
The M3 Carl Gustaf is an 84mm recoilless rifle system that can shoot a variety of high-explosive rounds at a variety of targets, including armored vehicles.
And this graphic, updated in February 2018, and which was given to Business Insider by the Army, shows all the current and future standard issue weapons.