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Browning M37



Overview


M37

A M37 coaxial machine gun with the lengthened charging handle clearly visible.
Source: www.browningmgs.com - © copyright lies with original owner

Origin
United States
Type
Vehicle machine gun
Entered service
1955
Status
Limited service
Development
Late 1940's - 1953
Developer
United States - Saco-Lowell
Production
1955 - 1957
Producer
United States - Saco-Lowell
United States - Rock Island Arsenal
Designations
T153 (trials designation)
Notable users
United States

Description


Introduction

The M37 is a post WW2 vehicle machine gun of US origin. The design is based on the Browning M1919, but features a number of alterations that make it more suitable as a coaxial machine gun.

Design

The M37 is very similar to the M1919. It is a belt fed air cooled machine gun optimized for vehicle use. The main difference is the ability for left and right hand feeding. It is solenoid fired. Alternatively, a pistol grip and trigger are located on the rear of the receiver. The charging handle has been extended rearwards for use in confined spaces.

Firepower

The M37 fires the .30-06 Springfield round from belts that are usually 250 rounds long. The cyclic rate of fire is rather low at 400 to 550 rpm. Effective range is about 1 km. A number of M37 were converted to 7.62x51mm NATO and are known as M37E1.

Users

The M37 was adopted by the United States in 1955. It was mostly used on the M48 and M60 Patton main battle tanks. The M37C was used in limited numbers, mostly on XM1/E1 mount on OH-13 and OH-23 helicopter gunships. A number of M37 was converted to 7.62x51mm NATO as interim solution until adoption of the M73 vehicle machine gun.

Variants

M37
Production model for vehicle use, chambered in .30-06 Springfield. Known as T153 during trials.
M37C
Variant of the M37 for aircraft use. Does not feature a sight bracket.
M37E1
Existing stocks of M37 machine gun converted to 7.62x51mm by Rock Island Arsenal and Springfield Armory. Interim use until adoption of M73.

Details


Facts M37
General
Origin
United States
Type
Vehicle machine gun
Caliber
Caliber
.30-06 Springfield
(7.62x51mm NATO in M37E1)
Feed system
Belt fed, left or right hand feed
250 round belts
Barrel length
610 mm
Rifling
4 grooves, 254 mm right hand twist
Muzzle velocity
860 m/s
Operation
Action
Short recoil, closed bolt
Locking
Locking block
Fire selector
0 - F
Rate of fire
400 - 550 rpm
Dimensions
Length
1.060 m
Weight
14.1 kg empty
Sights
Mechanical
Iron sights, blade front and leaf aperture rear
Sight radius
354 mm