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SELF-PROPELLED, FULL-TRACK GUNS AND HOWITZERS

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ANTIAIRCRAFT GUNS Name Gun 90mm, M1, M1A1, M1A2 and M1A3; Mount, AA, 90mm, M1A2 also Mount, Gun, 90mm, AA, M1A1. Weight (Complete Weapon) Gross weight 19,000 lbs

Automatic-No, Semi-automatic

Type of Fire-Ground to air; secondary role (ground to ground)

Projectiles (Kind & Size)

HE M71 Shell and WP M313 Shell 90mm
APC-T M82 projectile 90mm
HVAP-T M304 Shot

Rate of fire-22 rounds per minute

Maximum Range

HE (limited by 30 sec MT fuze)
HE (with PD fuze) Smoke
APC-T

HVAP-T

....

.12,000 yd

..19,560 yd ..21,400 yd .15,700 yd

Type of Targets-Aircraft at speeds up to 400 mph and altitudes up to 30,000 feet Means of Transportation-Towed by prime mover (10 ton, 6 x 6 truck, M125)

Name-Gun, Antiaircraft, 75mm Weapon System, Towed, M51 with components (Skysweeper), Cannon, 75mm Gun, M35. Weight Gross weight: Approximately 19,200 lbs with fire control (complete system) Automatic-Yes

Type of Fire-Ground to air; secondary role (ground to ground)

Projectiles (Kind & Size)—

Cartridge, HE, 75mm (T50E2) M334
Cartridge, TP, 75mm, T50E2

Cartridge, Drill, 75mm, T146 (Series)

Cartridge, AP-T, 75mm, T149E1
Cartridge, CHEM, 75mm, T262

Rate of Fire-Approximately 45 rounds per minute

Maximum Range-20,000 ft

Type of Targets-Airborne targets flying at speeds up to 1,350 ft/sec and up to an altitude of 8,500 yds

Means of

Transportation-The gun is mounted on a combination chassis and gun mount, and moved by means of two removable two-wheeled suspensions (bogie). The suspensions are shock absorber stabilized to permit towing by a prime mover at speeds practicable with the terrain. Prime mover Truck Cargo 10-ton 6 x 6, M125.

Name-Gun, 90mm, M2A2; Mount, AA, 90mm
Gun, M2A1, also Mount, AA, 90mm Gun,
M2.

Weight-Gross weight 34,170 lbs
Automatic-No, Semi-Automatic

Type of Fire Ground to air; secondary role (ground to ground)

Projectiles (Kind & Size)-All 90mm-
Fixed-HE, M71

Armor-Piercing Capped Projectile M82
Armor-Piercing Shot M77

Inert-loading Practice Shell M71
Drill Cartridge M12

Rate of Fire-23 to 28 rounds per minute
Maximum Range-

HE (ltd. by 30 sec MT fuze) ..12,000 yds HE (with PD fuze) smoke .....19,560 yds 21,400 yds 15,700 yds

APC-T

HVAP-T

Type of Targets Aircraft at speeds up to 400 mph and altitude up to 30,000 feet Means of Transportation-Towed by prime mover (10-ton 6 x 6 truck, M125)

Name Gun, 120mm, M1A3; Mount, AA,
120mm Gun, M1A2.
Weight-Gross weight, 67,600 lbs
Automatic-Yes

Type of Fire-Ground to air; secondary role
(ground to ground)
Projectiles (Kind & Size)-Separated (Pro-
jectile and cartridge case containing
propelling charge, primer, and closing
plugs packed separately); HE with time
fuze Shell, HE, M73, with fuze, MT,
M61 or M61A1 for 120mm gun, Shell,
HE, M73, with supplement charge with
fuze, Mount, M61 or M61A1, for 120mm
gun

Rate of Fire-10 rounds per minute
Maximum Range (Using 3,000 ft/sec average
muzzle velocity)-
Vertical

Horizontal

.15,800 yds (limited by 30 sec fuze) .28,250 yds

(45° elevation when not limited by fuze) Type of Targets-Aircraft at speeds up to 400 mph and altitudes up to 40,000 feet. Means of Transportation-Towed by prime mover 38-ton high speed tractor M6 (all terrain); 10-ton 6 x 6 truck, M125 (highway only).

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Weight-4300 lbs approximately
Automatic-Yes, and/or semi-automatic
Type of Fire-Primary role: ground to air;
secondary role: ground to ground
Projectiles (Kind & Size)-

Shell, HE-T, 40mm, MK2, Assembly 3
Shell, TP-T, 40mm, MK2, Assembly 5
Shell, TP-T, 40mm, M91, Assembly 7
Cartridge, Drill, M17, Assembly 9
Cartridge, Drill, M17B1, Assembly 9
Cartridge, Drill, M25, Assembly 11
Rate of Fire-120 rpm
Maximum Range-5200 yards (limited by
SD tracer)

Type of Targets-Aerial and Ground Means of Transportation-Towed by 22-Ton 6 x 6 Truck or in an emergency by any suitable vehicle with a pintle tow hook.

Name Carriage, AA, 40mm, M2A3 with Gun,
Automatic, 40mm, M1A1, Control Sys-
tem, Local, M22, Sight, Computing,
M19A1, and Sight, Reflex, M24C.
Weight-Approximately 6,000 lbs
Automatic Yes, and/or semi-automatic
Type of Fire-Primary role: ground to air;
secondary role: ground to ground
Projectiles (Kind & Role)-

Shell, HE-T, 40mm, MK2, Assembly 3
Shell, TP-T, 40mm, MK2, Assembly 5
Shell, TP-T, 40mm, M91, Assembly 7
Cartridge, Drill, M17, Assembly 9
Cartridge, Drill, M17B1, Assembly 9
Cartridge, Drill, M25, Assembly 11
Rate of Fire-120 rpm

Maximum Range-5,200 yards (limited by SD tracer)

Type of Targets-Aerial and Ground Means of Transportation-Towed by 21⁄2-ton 6 x 6 cargo truck or in an emergency by any suitable vehicle with a pintle tow hook.

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Automatic-Yes, and/or semi-automatic Type of Fire-Primary role: ground to air; secondary role: ground to ground

Projectiles (Kind & Size)

Shell, HE-T, 40mm, MK2, Assembly 3
Shell, TP-T, 40mm, MK2, Assembly 5
Shell, TP-T, 40mm, M91, Assembly 7
Cartridge, Drill, M17, Assembly 9
Cartridge, Drill, M17B1, Assembly 9
Cartridge, Drill, M25, Assembly 11

Rate of Fire-120 rpm per gun, total 240

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Name Mount, Gun, 40mm, M3 (Deck Mount) with Gun, Automatic, 40mm, M1.

Weight-Approximately 3,000 lbs

Automatic Yes, and/or semi-automatic Type of Fire-Primary role: ground to air; secondary role: ground to ground Projectiles (Kind & Size)—

Shell, HE-T, 40mm, MK2, Assembly 3 Shell, TP-T, 40mm, MK2, Assembly 5 Shell, TP-T, 40mm, M91, Assembly 7 Cartridge, Drill, M17, Assembly 9 Cartridge, Drill, M17B1, Assembly 9 Cartridge, Drill, M25, Assembly 11 Rate of Fire-120 rpm

Maximum Range-5,200 yards (Limited by
SD tracer)

Type of Targets-Aerial and Ground
Means of Transportation-Fixed Mount on
Ship Decks

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Length (overall)

Fin Span

Propellant

Launcher
Type
Vehicle
Weight

Length (overall)
Width (overall)
Height (overall)
Guidance Length
Elevation
Traverse
Cross Level

762mm .5860 lb 327 inches 104 inches

..Solid Double Base

...Self-Propelled .5-ton, 6x6 Truck

.33,750 lb 389 inches 114 inches .105 inches ..15 ft 6° to 60° 15° R&L .10° R&L

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The enormous demands for weapons and ammunition made by modern war are illustrated by the following table, which shows the principal items of Ordnance Corps procurement for World War II

Rifles, pistols, carbines, revolvers, submachineguns

Machineguns, ground (other than anti-aircraft)

Rocket launchers

Aircraft guns, including machineguns

Antiaircraft guns, including machineguns

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17,444,856

965,365

635,128

1,791,343

129,473

63,181

27.082

116,114

105,054

2,189 88,410 2,941,869

328,669,000

423,409,000

85,646,000

95,690,000

18,296,000

41,788,593,000 36,098,000

a Includes vehicles procured by the Quartermaster Corps before 1 September 1942, when procurement responsibility for transport vehicles passed to the Ordnance Corps.

b Some bomb clusters contained as many as 24 small bombs.

The above tabulation also illustrates the rapid progress in the development of new weapons, since it does not include various items which would be in

demand today in case of a major war, such as guided missiles and atomic munitions.

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