Best Army Of The World

Rank 1 - United States Army (USA)

Total Army Personnel: 561,980 
M1 Abrams Tanks: 8,325
Anti-Tank (AT) Weapons: 8,000
Humvee - Multipurpose Wheeled Vehicle:    160,000
M2 Bradley - Infantry Fighting Vehicles (IFV): 6,452
M3 Bradley - Reconnaissance vehicle: 1,200
M113 - Armored Personnel Carriers (APC): 6,700
Stryker - Armored personnel carrier (APC): 3,000
M88 Hercules - Armored recovery vehicle: 676
M109 - Self-propelled howitzer: 1,934
Avenger - Self-propelled anti-aircraft weapon: 1,000
M119 Howitzer: 500
M198 Howitzer: 653
M777 Howitzer: 638
HIMARS -    Multiple rocket launcher: 340
M270 - Multiple rocket launcher: 990
Mortars: 7,500
Patriot - Surface-to-air missile (SAM): 1,106 
Anti-Aircraft (AA) Weapons: 2,100
Army Fixed-wing Aircraft: 261
Army Helicopters: 4,993
UAV: 132
M9 - Combat engineering vehicles: 447
Logistical Vehicles: 267,240
Total Land Army Weapons: 56,000

List of US Army equipment inventory:

Tanks:
M1 Abrams - Main battle tank 

Land Vehicles:
Humvee -    High Mobility Multipurpose Wheeled Vehicle (HMMWV)   
Stryker - Armored personnel carrier    
M113 - Armored personnel carrier    
M2 Bradley - Infantry fighting vehicle        
M3 Bradley - Reconnaissance vehicle        
M88 Hercules - Armored recovery vehicle    
M142 High Mobility Artillery Rocket System (HIMARS) - Multiple rocket launcher        
M270 - Multiple rocket launcher        
Centurion - Anti-Projectile Vehicle         
Avenger - Self-propelled anti-aircraft weapon         
Patriot - Surface-to-air missile       
M109 Self-propelled howitzer        
M119 Howitzer       
M198 Howitzer        
M777 Howitzer        
M9 - Combat engineering vehicle       
M939 Truck   
FMTV Truck - Family of Medium Tactical Vehicles (FMTV)        
HEMTT - Heavy Expanded Mobility Tactical Truck (HEMTT)           
HETS (Heavy Equipment Transport System) Truck           
Mine Resistant Ambush Protected (MRAP) vehicles

Fixed-wing Aircraft:
C-12 Huron - Cargo/Transport Aircraft
C-23 Sherpa - Cargo/Transport Aircraft
C-26 Metroliner - Cargo/Transport Aircraft
RC-12 Huron - Reconnaissance Aircraft
Cessna UC-35 - Utility Aircraft
de Havilland Canada Dash 7 -     airborne reconnaissance aircraft
Alenia C-27J Spartan - transport aircraft

Helicopters:
AH-6 Little Bird - Attack Helicopter    
AH-64 Apache - Attack Helicopter 
CH-47 Chinook - Cargo Helicopter 
EH-60 Black Hawk - Electronic-Warfare Helicopter    
MH-47 Chinook - Multi-Mission Helicopter 
MH-60 Black Hawk - Multi-Mission Helicopter 
OH-58 Kiowa - Observation Helicopter 
TH-67 Creek - Training Helicopter    
UH-1 Iroquois - Utility Helicopter 
UH-60 Black Hawk - Utility Helicopter 
UH-72 Lakota - Utility Helicopter 

Unmanned Aerial Vehicles (UAVs):
MQ-1C Warrior - Extended-Range Multi-Purpose (ERMP) UAV

Vessels:
Watercraft:
Spearhead high speed logistics ship - Theater Support Vessel     
General Frank S. Besson, Jr.  class Logistics Support Vessel - Logistics Support Vessel 
Stalwart class ocean surveillance ship - Ocean Surveillance Ship
Runnymede class large landing craft - Landing Craft Utility
MGen. Nathanael Greene class large coastal tugs - Large Tug

Weapons:
Personal Weapons:
M9 pistol 
M16A4    
M4/M4A1  
M16 rifle
M4 carbine
M1911 pistol
M231 Firing Port Weapon (FPW)
Mk 14 EBR - Mark 14 Enhanced Battle Rifle (EBR)
M14 Rifle
M249 Squad Automatic Weapon (SAW)
M249 Light Machine Gun
M24 Sniper Weapon System (SWS)
M110 Semi-automatic sniper system (M110 SASS)
M110 Sniper Rifle
M82/M107
Barrett M82
M9 bayonet  
M203 grenade launcher (40mm)  
M320 grenade launcher (40mm)  
XM2010 Enhanced Sniper Rifle (ESR)
SIG Sauer P228
.300 Winchester Magnum
FN SCAR -  Special Operations Forces (SOF) Combat Assault Rifle or SCAR
Mossberg 500
Benelli M4 Super 90
Squad Designated Marksman Rifle (SDM-R) 

Support Weapons:
Machine guns:
M60 machine gun 
M240 Medium Machine Gun
M2 Heavy Machine Gun  
MK 19 grenade machine gun 
Mk 19 grenade launcher

Anti-tank:
AT4 light anti-tank weapon

Missiles:
FGM-148 Javelin 3rd generation fire & forget top-attack anti-tank guided missile (ATGM)
BGM-71 TOW (Tube-launched, Optically-tracked, Wire command data link)  2nd generation wire guided anti-tank missile (ATGM)
FIM-92 Stinger - shoulder-launched, heat seeking anti-aircraft missile (AAM)

Mortars:
M224 mortar - 60 mm infantry company level
M252 mortar - 81 mm infantry battalion level 
M120 mortar - 120 mm (US Army's largest mortar) employed by mechanized units

Vehicle-Mounted Weapons:
M240, MK 19, and M2 machine guns 
M134 Minigun 
GAU-19  (.50 caliber ammunition mounted on Humvees & Helicopters)
M230 Autocannon (mounted on AH-64 Apache & UH-60 Black Hawk Direct Action Penetrator helicopters) 
M230 Chain Gun
M242 Autocannon (armaments of Bradley Fighting Vehicle, anti-air & anti-surface naval armaments) 
M242 Chain Gun

Ammunition:
5.56x45mm NATO
7.62x51mm NATO
9x19mm NATO
12.7x99mm NATO
25x137mm NATO
30x113mm NATO
12 gauge
45 ACP (Automatic Colt Pistol)
Hand grenades
M67 fragmentation grenade
M18 smoke grenade

Most common weapons used by US Army:
M16 rifle
M4 carbine
M203 grenade launcher
M1014 Joint Service Combat Shotgun (Mossberg 590 Shotgun)

Most common sniper weapons used in the U.S. Army:
M14EBR   M107 Long Range Sniper Rifle
M24 Sniper Weapon System
M110 Semi-Automatic Sniper Rifle

Most commonly used machine gun in the US Army:
M240 standard medium machine gun
M2 heavy machine gun
MK 19 grenade machine gun

Primary sidearm in the U.S. Army:
9 mm M9 pistol

Commonly used U.S. Army specialized weapon:
M249 SAW (squad automatic weapon)

Most common hand grenades used by U.S. Army:
M67 fragmentation grenade
M18 smoke grenade

US Army's most commonly used land vehicle:
Humvee

US Army's main artillery weapons:
M109A6 Paladin self-propelled howitzer
M270 Multiple Launch Rocket System (MLRS)

US Army's most commonly used aircrafts:
AH-64 Apache attack helicopter
OH-58D Kiowa Warrior armed reconnaissance/light attack helicopter
UH-60 Black Hawk utility tactical transport helicopter
CH-47 Chinook heavy-lift transport helicopter