Some weapon spesification in COD : modern Warfare3

• Specifications AT4
  Weight	6.7 kg (14.8 lb)[4]
  Length	102 cm (40 in)[4]
  Caliber	84 mm
  Muzzle velocity	290 m/s (950 ft/s)[5]
  Effective firing range	300 m (point target)[4]
  Maximum firing range	500 m (area target) 2100 m (maximum)
  Sights	Iron sights, optional night vision unit
  Filling	Octol
  Filling weight	440 g HEAT (High Explosive Anti-Tank round)

Specifications WA 2000
Weight	6.95 kg (15.3 lb) empty (no scope) [2] 7.35 kg (16.2 lb) loaded (no scope) [2]
Length	905 mm (35.6 in) [2]
Barrel length	650 mm (25.6 in) [2]
Cartridge	7.62x51mm NATO [2] .300 Winchester Magnum[2] 7.5x55mm Swiss [2]
Action	Gas-operated,[2] rotating bolt
Rate of fire	Semi-automatic [2]
Effective firing range	2,297ft, 700m, 766yds
Feed system	6-round detachable boxmagazine.[2] A 10-round magazine was also made but never used nor exported.
Sights	Schmidt & Bender 2.5–10Xtelescopic sight [1]

Specifications DShK
Weight	34 kg (74.96 lb) (gun only) 157 kg (346.13 lb) on wheeled mounting
Length	1,625 mm (64.0 in)
Barrel length	1,070 mm (42.1 in)
Crew	1+
Cartridge	12.7×108mm
Action	gas-operated reloading locking flaps
Rate of fire	600 rounds/min
Muzzle velocity	850 m/s (2,788 ft/s)
Effective firing range	2000 m
Maximum firing range	2500 m
Feed system	belt 50 rounds
Sights	Iron/Optical

Specifications Phalanx CIWS
Weight	12,500 lb (5,700 kg), later models 13,600 lb (6,200 kg)[1]
Barrel length	• Block 0 & 1 (L76 gun barrel): 1,520 mm (59.8 in) • Block 1B (L99 gun barrel): 1,981 mm (78.0 in)[2]
Height	4.7 m (15 ft 5.0 in)
Crew	Automated, with human oversight
Shell	• Naval: Armor-piercingtungsten penetrator rounds with discarding sabots. • Land: High-Explosive Incendiary Tracer, Self-Destruct.
Caliber	20×102mm
Barrels	6-barrel (progressive RH parabolic twist, 9 grooves)
Elevation	• Block 0: -10°/+80° • Block 1: -20°/+80° (Rate of elevation: 86°/sec for Block 0/1) • Block 1B: -25°/+85° (Rate of elevation: 115°/sec)[2]
Traverse	• 150° from either side of centerline (Rate of traverse: 100°/sec for Block 0 & 1, 116°/sec for Block 1B)[2]
Rate of fire	4,500 rounds/minute (75 rounds/second).
Muzzle velocity	1,100 m/s (3,600 ft/s)[2]
Effective firing range	3.6 km (2.2 mi)[2]
Maximum firing range	Classified[1][3]
Main armament	1× 20 mm (0.79 in) M61 Vulcan 6-barreled Gatling cannon[4]
Guidance system	Ku-band radar and FLIR[5]

Specifications Barett M822
Weight	M82A1: 29.7 lb (13.5 kg) (20" barrel) 30.9 lb (14.0 kg) (29" barrel)
Length	M82A1: 48 in (120 cm) (20" barrel) 57 in (140 cm) (29" barrel)
Barrel length	M82A1: 20 in (51 cm) 29 in (74 cm)
Cartridge	50 BMG .416 Barrett
Action	Recoil-operated, rotating bolt
Muzzle velocity	853 m/s (2,799 ft/s)
Effective firing range	1,800 m (1,969 yd)
Feed system	10-round detachable boxmagazine
Sights	Fixed front, adjustable rear sight; MIL-STD-1913 railprovided for optics