M-45 Quad Mount

This M45 Quad Mount is an exceptionally well-presented and recently refurbished example on its correct M20 (M55) trailer, dating from 1944. This iconic World War II anti-aircraft system represents one of the most recognizable and formidable mobile defense platforms of its era. Offered in very complete and operational condition, the piece retains a high degree of authenticity while benefitting from careful refurbishment. The system features a functioning auxiliary generator and fully operational ...

This M45 Quad Mount is an exceptionally well-presented and recently refurbished example on its correct M20 (M55) trailer, dating from 1944.
This iconic World War II anti-aircraft system represents one of the most recognizable and formidable mobile defense platforms of its era.
Offered in very complete and operational condition, the piece retains a high degree of authenticity while benefitting from careful refurbishment. The system features a functioning auxiliary generator and fully operational traverse and elevation mechanisms. A rare and visually striking centerpiece, equally suited for serious collectors, museums, or historic vehicle displays.

The M45 was renowned for its exceptionally high rate of fire, reaching up to approximately 2,300 rounds per minute combined. While originally designed to counter low-flying aircraft, it was widely employed against ground troops and light vehicles, where its concentrated firepower proved equally formidable and tactically invaluable.

Thanks to its solid refurbishment, this piece is suitable for both static display and demonstration purposes. A rare opportunity to acquire an iconic anti-aircraft system.

Location

Nederweert, The Netherlands

Year of construction

1944

Country of origin

United States of America

Manufacturer

Maxson Corporation

Type

M45 Quad .50 Cal Anti-Aircraft Mount on M20 Trailer (M55)

Condition

Very complete / Good running condition

Margin Goods

Yes margin goods; No VAT applicable

€ 24.750,-

Incl. commission

Details

Condition

Presented in notably good and operational condition, this M45 Quad Mount has undergone a recent refurbishment with attention to both mechanical integrity and visual presentation.
The Briggs & Stratton generator is reported to run well, supplying the system as intended. Traverse and elevation mechanisms operate smoothly, and the installation remains complete in its configuration. The presence of the original tombstone drums further enhances its completeness and collector appeal. The overall appearance is clean and well-maintained, reflecting careful ownership and sympathetic restoration, making it suitable for demonstrations and events.

Note to Buyer

The two currently installed .50 CAL machine guns are not included in the sale.

Shipping information

Transport and shipping can be arranged upon request. The unit is mounted on a trailer, which facilitates easier transport. International shipping can be organized at additional cost. Collection in Nederweert (The Netherlands) is also possible. Assistance with export documentation can be provided if required.

Specifications

Technical details

Model: M45 Quad Mount
Trailer: M20 (M55)
Year: 1944
Frame No.: 8429L
Configuration: Quad mount for four .50 caliber machine guns
Drive system: Electrically powered traverse and elevation system
Generator: Briggs & Stratton auxiliary unit (6V, operational)
Ammunition system: Includes 4 original “tombstone” drums
Construction: Steel
Finish: Finished in period-correct U.S. Olive Drab
Power: 2x 6V batteries
Armor: Yes
Caliber: 4x CAL 50 (12,7 mm)
Elevation: -5° to +90°
Traverse: 360°
Firing rate: 4 × 575 = approx. 2,300 rpm
Muzzle velocity: 2.900 ft/s (890 m/s)
Maximum firing range: 1.1 mi (1,8 km) (horizontal); 1.6 mi (2,5 km) (maximum)
Feed system: Belt-fed (M2 or M9 links)
Crew: 1
Production numbers: Approx 1.800
Length: 6 ft. 4.5 in.(1,94 m)
Width: 6 ft. 9 in. (2,06 m)
Height: 4 ft. 7.0 in. (1,40 m)

History

Developed by the Maxson Corporation during the Second World War, the M45 Quad Mount was conceived as a highly effective mobile anti-aircraft system capable of engaging low-flying aircraft with devastating firepower. Equipped with four .50 caliber Browning machine guns, the system combined a high rate of fire with electrically powered aiming, offering a significant tactical advantage in fast-moving combat environments.

Widely deployed by United States and Allied forces across both the European and Pacific theatres, the M45 quickly earned a reputation for reliability and effectiveness. Its versatility also saw it employed against ground targets, where its concentrated firepower proved equally formidable. The system continued in service beyond the Second World War, notably during the Korean War.

Mounted on the M20 trailer, the unit provided mobility and rapid deployment capability, making it a vital asset in forward defense positions. Today, surviving examples are highly prized for their historical importance, mechanical ingenuity, and unmistakable visual presence. Today, it remains a highly sought-after collector’s item due to its historical significance, striking appearance, and advanced engineering for its time.

In addition to its primary role as an anti-aircraft system, the M45 Quad Mount proved devastatingly effective against ground targets. Its immense combined firepower earned it the infamous nickname “meat chopper” among troops, reflecting both its effectiveness and psychological impact on the battlefield.