In Blacklight: Retribution, a Hero Weapon works almost the same way as a Premade Weapon does. You cannot change any of its components or use them on other weapons. The difference is that you cannot purchase them without the Hero. And even after purchase, it is impossible to use the weapon with your regular agent, it will only be available when you use the Hero. The in-game description will refer to them as 'custom' weapons (as opposed to 'premade' weapons). While it is possible to change the Camo and weapon tag on a Premade, Hero Weapons do not offer this.