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Anti-aircraft gunsIn service
Anti-aircraft gun , heavy machine gun
M45 quad mount is a anti-aircraft gun , heavy machine gun originating in United States. Reported operators include Belgium, Colombia, Ecuador, El Salvador, Denmark, France, Germany, Haiti, United States, Mexico, Netherlands, Nicaragua, South Korea, South Vietnam, Taiwan (Republic of China), Thailand, Turkey, Vietnam, Pakistan, Philippines, Portugal, Israel, Italy, Japan, Jordan.
United StatesAnti-aircraft gun , heavy machine gun
United States
World War II First Indochina War Korean War Vietnam War Portuguese Colonial War Indo-Pakistani War of 1965 Lebanese Civil War 1978 South Lebanon conflict Nicaraguan Revolution 1982 Lebanon War Sino-Vietnamese War Third Indochina War Salvadoran Civil War
2,396 lb (1,087 kg)
5 ft 3 in (1.6 m) L/50
.50 BMG (12.7×99mm NATO)
21 oz (.6 kg)
0.50 in (12.7 mm)
Short recoil-operated
-5° to +90°
360°
575 x 4 = 2,300 rpm
2,900 ft/s (890 m/s)
4,900 ft (1.5 km) (effective AA) 15,000 ft (4.5 km) (maximum AA)
1.1 mi (1.8 km) (horizontal) 1.6 mi (2.5 km) (maximum)
Belt-fed (M2 or M9 links)
Belgium
Colombia
Ecuador
El Salvador
Denmark
France
Germany
Haiti
United States
Mexico
Netherlands
Nicaragua
South Korea
South Vietnam
Taiwan (Republic of China)
Thailand
Turkey
Vietnam
Pakistan
Philippines
Portugal
Israel
Italy
Japan
Jordan
The M45 is operated by two loaders and one gunner.
Costruttore Maxon Manufacturing Co.
Reference text from Wikipedia contributors, used under CC BY-SA 4.0.
Points represent sourced observations, including revisions. Revisions on the same effective date are not separate inventory events. Ranges appear in the table and are not plotted as exact points.
| Observation / report period | Value | Source | Claim state |
|---|---|---|---|
| 28 Sept 2026 | 1,087 kg | Wikipedia contributors | superseded |
| 28 Sept 2026 | 1,087 kg | Wikipedia contributors | superseded |
| 28 Sept 2026 | 1,087 kg | Wikipedia contributors | superseded |
| 28 Sept 2026 | 1,087 kg | Wikipedia contributors | superseded |
| 28 Sept 2026 | 1,087 kg | Wikipedia contributors | superseded |
| 28 Sept 2026 | 1,087 kg | Wikipedia contributors | superseded |
| 28 Sept 2026 | 1,087 kg | Wikipedia contributors | superseded |
| 28 Sept 2026 | 1,087 kg | Wikipedia contributors | superseded |
| 28 Sept 2026 | 1,087 kg | Wikipedia contributors | superseded |
| 28 Sept 2026 | 1,087 kg | Wikipedia contributors | superseded |
| 28 Sept 2026 | 1,087 kg | Wikipedia contributors | approved |
M45 quad mount equipment records. Variants, orders and quantities are shown as reported in each inventory source; coverage is incomplete.
Belgium
Burkina FasoArmy exact named equipment holdings: TCM-20. Active, operational-reserve and training units excluding equipment in store; November 2025 IISS assessment. Named service only; no parent-force or national total inferred. Source role: AIR DEFENCE / 20mm. Original estimates, ranges, reporting names, reserve, lease and employment scopes retained; nested included counts are not added. Missile-system quantities mean launchers, not rounds. No readiness, crew, carried weapon, payload, factory-production or future order count inherited.
ChileArmy exact named equipment holdings: TCM-20. Active, operational-reserve and training units excluding equipment in store; November 2025 IISS assessment. Named service only; no parent-force or national total inferred. Source role: AIR DEFENCE / TOWED 20mm. Original estimates, ranges, reporting names, reserve, lease and employment scopes retained; nested included counts are not added. Missile-system quantities mean launchers, not rounds. No readiness, crew, carried weapon, payload, factory-production or future order count inherited.
Colombia
Denmark
Ecuador
El SalvadorArmy exact named equipment holdings: TCM-20. Active, operational-reserve and training units excluding equipment in store; November 2025 IISS assessment. Named service only; no parent-force or national total inferred. Source role: AIR DEFENCE / 20mm. Original estimates, ranges, reporting names, reserve, lease and employment scopes retained; nested included counts are not added. Missile-system quantities mean launchers, not rounds. No readiness, crew, carried weapon, payload, factory-production or future order count inherited.
France
Germany
Haiti
HondurasAir Force exact named equipment holdings: TCM-20. Active, operational-reserve and training units excluding equipment in store; November 2025 IISS assessment. Named service only; no parent-force or national total inferred. Source role: AIR DEFENCE / GUNS 20mm. Original estimates, ranges, reporting names, reserve, lease and employment scopes retained; nested included counts are not added. Missile-system quantities mean launchers, not rounds. No readiness, crew, carried weapon, payload, factory-production or future order count inherited.
Israel
Italy
Japan
Jordan
KenyaArmy exact named equipment holdings: TCM-20. Active, operational-reserve and training units excluding equipment in store; November 2025 IISS assessment. Named service only; no parent-force or national total inferred. Source role: AIR DEFENCE / 20mm. Original estimates, ranges, reporting names, reserve, lease and employment scopes retained; nested included counts are not added. Missile-system quantities mean launchers, not rounds. No readiness, crew, carried weapon, payload, factory-production or future order count inherited.
Mexico
Netherlands
Nicaragua
Pakistan
Philippines
Portugal
South Korea
Thailand
TürkiyeReported count for M45 Quadmount. Service scope: Turkish Land Forces; does not replace a national total. 1 distinct count cell(s) from the same source list; shared rowspan cells counted once. Excludes retired/reserve/on-order rows. Count column(s): quantity: 160. Origin: United States. The listed variants/roles are the scope, not an immediately deployable count. The components do not establish one inventory census date; the stored date is the retrieved source snapshot.
United States
UruguayArmy exact named equipment holdings: TCM-20 (w/Elta M-2106 radar). Active, operational-reserve and training units excluding equipment in store; November 2025 IISS assessment. Named service only; no parent-force or national total inferred. Source role: AIR DEFENCE / 20mm. Original estimates, ranges, reporting names, reserve, lease and employment scopes retained; nested included counts are not added. Missile-system quantities mean launchers, not rounds. No readiness, crew, carried weapon, payload, factory-production or future order count inherited.
VenezuelaLower-bound count for TCM-20. Country-wide list; no individual service specified. 1 distinct count cell(s) from the same source list; shared rowspan cells counted once. Excludes retired/reserve/on-order rows. Count column(s): quantity: 114+. Origin: United States. The listed variants/roles are the scope, not an immediately deployable count. The components do not establish one inventory census date; the stored date is the retrieved source snapshot.
VietnamBelgium, Colombia, Ecuador, El Salvador, Denmark, France, Germany, Haiti, United States, Mexico, Netherlands, Nicaragua, South Korea, South Vietnam, Taiwan (Republic of China), Thailand, Turkey, Vietnam, Pakistan, Philippines, Portugal, Israel, Italy, Japan, Jordan
Equipment reference ↗