AEI Systems – SYS Group | 65+ Years of Medium-Calibre Firepower Excellence

AEI Systems (UK), a valued member of the SYS Group – one of Türkiye’s top 10 defence companies – and is a global leader in the development and manufacture of medium-calibre gun systems. With more than 65 years of heritage, AEI is recognised for precision engineering, innovation and pioneering revolver gun technology.

A Legacy of Engineering Firsts
From its early years, AEI led advancements in both revolver and sliding-breech gun technology. A defining milestone was engineering the first 25mm percussion-fired revolver gun capable of 1,800 rounds per minute.
Today, AEI continues this spirit through next-generation 30×113 mm systems, including the VENOM LR—the world’s lowest-recoil revolver gun and increasingly chosen by armed forces worldwide. AEI gun systems support air, land and naval platforms.

A Strategic Pillar of SYS Group
The acquisition of AEI Systems positioned the SYS Group among just three companies worldwide capable of producing 30×113mm med-cal gun systems.
Within the SYS ecosystem—alongside CANiK  and UNIROBOTICS —AEI contributes core firepower solutions across 7 production sites and 3 R&D centres on 3 continents, supported by nearly 1,100 employees.

This structure enables:
• Seamless integration of medium-calibre guns into modern weapon stations
• Shared engineering excellence and innovation
• Unified global logistics, training, and lifecycle support

Mission & Commitment
AEI contributes to global security through superior firepower, dependable technology and precision engineering. Our support extends beyond production through to comprehensive after-sales service, training, maintenance and lifecycle sustainment. Reliability and long-term partner trust define the AEI standard of excellence.
Forging the Future
AEI continues to innovate and shape the future of medium-calibre defence.

AEI Systems: Precision. Reliability. Firepower. Shaping the Future of Defence.

AEI Systems Ltd

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