Subsystems / Cannon / KBA

KBA

General Facts

  • TYPE
    Autocannon

  • ORIGIN
    Switzerland

  • NICKNAMES
    -

  • DESIGNED
    Early 1970's

  • DESIGNER
    Oerlikon

  • PRODUCTION
    Mid 1970's - present

  • PRODUCERS
    Switzerland - Oerlikon

  • QUANTITY
    Unknown

  • UNIT COST
    Unknown

  • CHARACTERISTICS
    Fires powerful ammunition
    High rate of fire
    Limited size and weight
    Instantanious belt switching

Introduction

The KBA is a 25mm autocannon of Swiss origin. It was developed in the mid 1980's by Oerlikon as a middle ground between the 20mm and 30mm autocannon in existence. The KBA is a relatively limited weight weapon with much increased firepower compared to 20mm weapons. Its size and weight allow for a wide range of applications.

Design

The KBA is a single barrel 25mm autocannon that has some charateristics from the earlier KAB, but functions differently. The KBA is gas operated and has a rotating bolt. The double belt feed allows for instantanious switching between ammunition types. Normally it is solenoid fired but a hand crank or trigger pedal can also be used.

Firepower

The KBA fires the 25x137mm NATO round for which a wide variety of ammunition types have been developed. The modes of fire are semi-automatic and fully automatic at a rate of fire of 600 rpm. The semi-automatic mode allows for very rapid succession shots up to about 200 rpm. The maximum effective range is about 2 km while the slant range for high explosive rounds is 3 km. The armor piercing rounds will penetrate nearly every medium weight fighting vehicle.

Platforms

The KBA is mostly used as vehicle armament for use against infantry and medium armored vehicles. Various turrets can be fitted with a KBA. Examples of vehicles armed with the KBA are the AIFV and Dardo infantry fighting vehicles. A secondary use for the KBA is as an anti-aircraft gun. Power operated single gun mounts are fitted to various ships and four guns are mounted in the SIDAM self-propelled anti-aircraft gun.

Variants

KBA

The Oerlikon KBA is a gas operated 25mm autocannon. There is only a single version of the KBA, although there are various mounting brackets depending on application. The KBA is used in various vehicle turrets and on a power operated naval gun mount.

  • Specifications:
  • KBA
TypeAutocannon
Caliber25x137mm NATO
MechanismGas operated
Barrel2.173 m, 18 grooves, progressive twist to 638 mm
Dimensions2.888 m long
Weight112 kg overall, 37 kg barrel
FeedingDouble belt feed
Rate of firesingle shot (200 rpm), 520 - 620 rpm
Muzzle velocity1.100 m/s (standard ammunition), 1.310 m/s (FAPDS)
Recoil38 mm recoil length
RemarksMuzzle brake

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