The OSIPR is essentially a Combine variant of current assault rifles referred to as AR2, commonly issued to it's Overwatch Soldiers (be they Army, Marines or Navy and Overwatch Elites. It has a 30-round magazine, which is reloaded with an automatic mechanism built into the weapon. A Dark Energy Energy Ball shooter is built into it; the orb is capable of disintegrating almost anything it touches. On the body can be seen the alphanumerics "V952", also featured on other Combine devices. The OSIPR is common amongst the Combine army and some other axis forces. It should be noted that other factions do use this rifle as well, namely resistance movements (most notably the Earth Freedom Fighters on Golmar Earth) on combine occupied planets. This rifle is the most common used rifle for the Combines but they also have a more automatic and accurate AR3. It's official name by combine forces is the Auto Rifle Mark 2 and the Dark Energy/Dark Matter Pulse Auto Assault Rifle Mark 2 respectively.
List of Civilizations/Factions that uses the OSIPR
Axis of Empires
- Empire of the Combine Race (creators)
Alliance of Nations
- Earth Freedom Fighters
- Human-Vortigaunt Federation