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25mm Bushmaster


M242


Overview


Bushmaster

The original 25mm Bushmaster with its four slot muzzle brake.
Source: Alliant Techsystems - © copyright lies with original owner

Origin
United States
Type
Autocannon
Entered service
1981
Status
In service
Development
1972 - 1973
Developer
United States - McDonnell Douglas
Production
1981 - present
Producer
United States - Hughes (1981 - 1985)
United States - McDonnell Douglas (1985 - 2002)
United States - Alliant Techsystems (2002 - 2018)
United States - Northrop Grumman (2018 - present)
Unit cost
$ 93.500 for M242 in 2006
Number produced
Over 10.600 produced by 1999
Designations
M242 (US military service)
Notable users
United States

Description


Introduction

The Bushmaster is a 25mm autocannon of US origin. It was developed in the early 1970's for the M2 Bradley mechanized infantry combat vehicle. The Bushmaster has proven to be a reliable and versatile weapon system that has been used on a wide number of vehicles, various naval applications and a few aircraft mountings. Later developments include the Bushmaster II and III that fire the more powerful 30mm and 35mm rounds respectively.

Design

The Bushmaster is a single barrel chaingun with double belt feed. The externally powered chain driven mechanism results in an extremely reliable weapon with a limited rate of fire. The mechanism also ensures that little gasses escape into the crew compartment and that the shell cases are gently ejected forward.

Firepower

The Bushmaster fires the 25x137mm NATO round that was first developed for use with the Swiss KBA autocannon. A wide variety of US and NATO ammunition is available. The rate of fire is selectable at 100 or 200 rpm. In theory 500 rpm is possible but most mounts cannon provide enough power. The maximum effective range is about 2 km while the slant range for high explosive rounds is 3 km. With depleted uranium APDS rounds the Bushmaster was even used sucessfully against T-55 tanks.

Platforms

The Bushmaster is best known for its use on the M2 Bradley mechanized infantry combat vehicle. It has also been used on a wide variety of other combat vehicles, including the LAV-25. The Bushmaster is also used on a manually operated pedestal mount on US Navy ships or in the Israeli Typhoon turret.

Details


Facts Bushmaster
General
Origin
United States
Type
Autocannon
Caliber
Caliber
25x137mm NATO
Feed system
Belt fed, twin feed system, selectable feed
Barrel length
2.175 m
Rifling
Right hand twist
Muzzle velocity
1.100 m/s (standard ammunition
1.420 m/s (APFSDS)
Operation
Action
Externally powered, chain driven
Rate of fire
Single shot, 100, 200, 500 rpm
Recoil force
40 kN
MRBS
22.000 rounds
Dimensions
Weight
119 kg overall
48.5 kg barrel
Length
2.572 m
Width
318 mm
Height
373 mm

Media


Related articles


35mm Bushmaster III

Bushmaster III is an upscaled Bushmaster autocannon. It fires the powerful 35x228mm round.

25mm Oerlikon KBA

The M242 Bushmaster fires the same ammunition as the Swiss Oerlikon KBA, which is a competitor to the Bushmaster.