« Special Dual-medium Assault Rifle is a bullpup rifle specially designed to allow shooting both on land and under water. It uses standard 5.56x45 mm rounds or special supercavitating ammunition which is efficient when used under water. But still, when under water, its range drops rapidly from 35 meters in 10 m depth to 13 meters in 40 m depth.
Field Manual

SDAR 5.56 mm
Faction - NATO
Type Bullpup Underwater Assault Rifle
Caliber 5.56×45 mm NATO
20 (Dual-Purpose)
Variants None

The SDAR is a 5.56 mm underwater assault rifle used by NATO, CSAT and AAF forces in ArmA 3.


The SDAR is a selective-fire, bullpup assault rifle that is chambered to fire the 5.56×45mm NATO round.

It can toggle between a three-round burst, semi-automatic, and full auto fire modes. Unlike most assault rifles, it cannot mount any optical sights or fit muzzle attachments.

Carried by the combat divers of each main faction, it is the only dual purpose weapon in the game that can be used on both land and underwater. It accepts all types of 5.56 mm NATO ammunition and can fire them while the weapon is submerged, but only the dual purpose magazines are capable of causing damage underwater (which have an effective range of about 30 metres).


  • The SDAR is based on the real-life "RFB" bullpup battle rifle designed by Florida-based firearms company Kel-Tec CNC Industries Inc.
    • In reality, the RFB is not designed to function as a dual purpose rifle, nor can it fire 5.56 mm as it chambered exclusively for the 7.62 mm NATO cartridge.
  • There is an unused top rail that is normally hidden during normal gameplay but can still be seen when the weapon is placed on the ground. However, it is still not possible to attach optics onto the SDAR in-game without the weapon being configured to do so through a replacement addon.
  • The SDAR is currently the only weapon in the ArmA 3 that can be operated underwater; both firing and reloading.
    • It is also the first weapon in the entire series that is specifically designed for underwater combat.


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