Siófok Firing Range
From Halopedia, the Halo wiki
The Siófok Firing Range was a weapons testing facility owned by Ushuaia Armory located at Siófok on planet Reach.[1][2]
Testing
In 2535, this facility was responsible for testing the MJOLNIR Powered Assault Armor/AA variant, an improved version of the Orbital Drop Shock Troopers' signature helmet, for the UNSC Army Airborne.[1]