The MACS M3 is a bullpup evolution of the original MACS M2 born from an RH-ALAN of Zagreb design. The original M2 was chambered for the powerful (and proven) .50 BMG cartridge as classified as an anti-material rifle. Such a weapon is useful in engaging key components of armored vehicles as well as fortified targets at range. The M3 retains the same function as the M2 before it save for its bullpup configuration which sets the action and feed aft of the pistol grip. In this way, it promotes a more compact profile of reduced weight.
The M3 utilizes the same bolt-action mechanism and single-shot firing as the M2. It is given a 10x42 telescopic sight as a standard fitting, lacking any available iron sights. The weapon also keeps its folding bipod support under the forend as well as its pistol grip functionality. Overall weight is 12 kilograms compared to the 12.4 kilogram mass of the original M2 model. All performance statistics are comparable to the M2 as well.
Adopted in 1997, the system continues service with the Croatian Army and has been taken on by the forces of Bosnia and Herzegovina, Romania, Serbia and Slovenia as well.