Established over 50 years ago.

AEI Systems is a UK BSI quality approved company, supplying weapon systems and military aircraft spares to customers around the world.
  • ADEN 30
    ADEN 30mm Aircraft cannon
    30mm gun
  • NSN 1005-99-964-2620
    Electrical Firing Unit L1A1
    NSN 1005-99-964-2620
  • Safety unit
    NSN 1005-99-962-9197
  • Electrical firing unit
    NSN 1005-99-961-5883
  • Aircraft weapon support
    ADEN 30mm, DEFA 30mm, M39
  • Aircraft spares
    Design Maintain & Manufacture
  • Naval weapon mounts
    20mm, 12.7mm & 7.62mm
  • AE20-NM
    HS804 20mm Cannon & Mount
  • INSPEKTA 30mm cannon
    30 x 173 mm Gas operated cannon
  • Barrel manufacture
    12.7mm - 105mm barrel manufacture
  • AE20-VM2
    HS804 20mm cannon & mount

AEI's Mission

We strive to offer price competitive quality products that perform reliably. Our flat management structure and ‘open door’ policy nurtures an enviable working environment that benefits staff, suppliers and customers alike.

Design Excellence

AEI specialise in the design, manufacture, test and support of a wide range of small to medium calibre military weapon systems for air, sea, land and dismounted soldier applications.


Renowned for aircraft cannon knowledge and expertise, AEI Systems is the Design Authority and ‘Original Equipment Manufacturer’ to BAE for the ADEN 30mm Gun system as installed in the Hawk advanced trainer aircraft.

Conveniently located

Working from a modern office and factory complex in Ascot, Berkshire, AEI Systems is conveniently located close to the M3, M4 and M25 motorways and London Heathrow airport.


Utilising modern Computer Aided Design (CAD), Simulation, Project Data Management (PDM) and Enterprise Content Management (ECM) systems. AEI Systems responds promptly to customer demands for new and innovative solutions and delivers new and ‘off the shelf’ products in a timely manner.

Through Life Support

Obsolescence management and continual product improvement has given rise to a new ‘high rate of fire’ revolver cannon. The ASPEN 30, with blast suppression, improved recoil systems and gas regulation catapults this ADEN 30 variant into the 21st century.