On 22 April 2021, FN Herstal created a teaser trailer, showcasing a new machine gun with the title "A New Chapter Begins".[3] On May 6, FN Herstal released a 20 minute promotional video, discussing the new design, including its technical aspects, and revealing its name: the EVOLYS.[4] In September 2021, the EVOLYS was first displayed to the public at the Defence and Security Equipment International trade show in London,[5] and it began to enter pre-production the same month.[6]
Design
The EVOLYS was designed from the ground up for use in urban warfare, which has become more common, and which holds specific requirements.[7] Rather than taking the base of fire from a squad, the EVOLYS was designed to improve the amount of firepower that could be provided by a single soldier.[7] It is select fire, with the option between semi-automatic and fully automatic fire modes.[8] The EVOLYS uses a lateral feed mechanism with the belt at a 45° angle, and it is fully ambidextrous,[9] with all its controls accessible on both its sides, and it can be loaded with one hand.[10]
The firing operation is unusual as it uses an open bolt, firing with a separate hammer upside down inside the upper receiver. This prevents accidents and runaways as even if the bolt moves forward, it won't fire unless the hammer is released by a trigger pull.[11] A single accessory rail mounted on the top of the receiver allows for the mounting of various optics, allowing for better target acquisition.[12] Previous machine gun designs had to use multiple rails, which were not integral to the receiver, making the attachment and usage of optics more difficult.[7] Due to the increased use of suppressors, the EVOLYS was designed to be capable of having a suppressor permanently fitted without it affecting the weapon's performance.[13]
The EVOLYS was constructed using 3D printing and polymers, which help to reduce its weight. At 5.5 kilograms (12 lb), the EVOLYS is up to 30% lighter than competing machine guns such as the FN Minimi.[5][14] The EVOLYS is chambered for 5.56×45mm and 7.62×51mm, with 6.5mm Creedmoor and .260 Remington variants in development for potential use by special forces.[6]