The light Ma Deuce mount

FN HERSTAHL has developed a new lightweight variant of its widely-fielded .50 cal crew-served weapon system, which will debut at this year’s Paris Air Show. Leveraging advanced composite materials, the new lightweight variant will result in a 40% weight reduction compared to previous examples while maintaining the same high-grade performance.

This innovation is focused specifically on the FN MEDIUM DOOR PINTLE TURNING (FN MDP TURNING) System, which mounts the combat-proven .50 cal FN M3M. The FN MDP TURNING System allows the crew-served weapon system to be easily retracted or removed when not in use, making it a highly versatile capability.

The Turning System is mounted using a connection plate, typically from a machined block of aluminium. This is then fitted to the helicopter floor using existing strong points that help distribute the mechanical forces that occur when the weapon is being operated. FN has driven the development of a new composite plate that replaces the aluminium example and reduces weight without compromising quality. This new composite plate has already passed rigorous MIL-STD-810G qualifications standards.

The new lightweight variant – which will be on display at FN Stand G51, Hall 2B at Paris Air Show from 16-22 June 2025 – is now ready for serial production and several projects are underway, either with OEMs or with end users directly.