Finnish weapons manufacturer Sako has unveiled the "Arctic Rifle Generation" (ARG), a new family of weapons specially developed for military and law enforcement operations in extreme climate zones. In close co-operation with the Finnish and Swedish defence forces, a system has been developed to replace older assault rifles, placing particular emphasis on reliability, modularity and adaptability. The weapons are based on the proven AR-15 platform and have been tested according to NATO D14 standards. We have taken a closer look at the individual models.
Two gas systems, two calibers, three weapons: Sako ARG models
At the center of the product family are the two variants, ARG 40 GP and ARG 40 DI, both in 5.56x45 NATO. The abbreviation GP stands for the short-stroke gas piston system used (Gas Piston), which is designed to ensure particularly high reliability even under the most adverse conditions thanks to lower heat and less carbon buildup. This version is intended for use in extreme climate zones such as the Arctic and significantly reduces maintenance requirements. The DI version, on the other hand, uses the direct impingement system, which is intended to impress with its lighter construction, greater accuracy and smoother shooting behaviour.
The assault rifle variants are complemented by the ARG 50 GP, a semi-automatic sniper rifle in 7.62x51 NATO. This version is designed for accurate shots at medium to long ranges and expands the ARG family with a specialised solution for snipers and designated marksmen.
Sako ARG: focus on modularity and ergonomics
Modularity is a key component of the ARG concept. The rear stock and handguard can be customised, while interfaces such as Picatinny rails and M-LOK slots enable the integration of optics, thermal imaging or night vision devices, lasers and other accessories. Many components are compatible with the AR-15 standard, which should make maintenance easier and create logistical advantages – even in crisis situations.
The modularity is complemented by a fully ambidextrous operating concept: the safety selector, magazine release and bolt catch are designed on both sides, making the firearms intuitive to use for both right-handed and left-handed shooters. A match-grade unit from Sako itself is used as the trigger. All models also have cold-hammer forged, hard-chromed barrels, which are designed to ensure a long service life and consistent accuracy. To summarise: “We designed the ARG to give clients the freedom to choose the right configuration for their needs,” said Sami Vaajamo, Senior Product Group Manager at SAKO. “Whether you're in a frozen tundra or a dense urban environment, the ARG adapts without compromise.”
Development, testing and ecosystem of the Sako ARG
To this end, the ARG series was also tested in accordance with NATO D14 standards and additionally tested under realistic extreme conditions. Tests in Arctic cold, muddy soils and sandy environments were intended to show the load limits and ensure that the systems remain functional even under the most adverse conditions. Feedback from the emergency services was continuously incorporated into the development process. “The development of the SAKO ARG platform began over a decade ago with a clear mission: to create a modern, modular rifle system capable of replacing legacy assault rifles across military and law enforcement forces,” said Miikka Tamminen, R&D Director at SAKO. “From day one, we prioritized real-world performance. That meant working hand-in-hand with professional users from defense organizations, incorporating their feedback into every design iteration—from ergonomics and modularity to reliability and maintainability.”
In addition to the rifle, Sako offers a full ecosystem around the weapon platform, which includes accessories and add-on parts, delivered through a trusted global partner network. There is also a lifecycle management programme that includes training for users and armorers, spare parts provisioning and modernisation services.
