Codenamed Project Einherjar during development, the Operative Rifle is designed to function in a number of different roles by making use of interchangeable modules. The OR is sold with only the standard blaster module, all others have to be purchased separately. The OR can only support a single module at once. Additionally, the power packs, blaster gas, scope & other features are located in the stock of the rifle, not in the modules. This reduces the weight that the modules to only a few kilograms each.