Are the sylladexes/strife specibuses actual real things in the Homestuck universe or is it a construct for the viewers? Like if someone actually makes their specibus hammerkind are they physically not allowed to effectively use any other weapon?

Dad gifted John an Array Modus for his birthday- Those things are not just real things, they’re commercialised in the setting. You may only wield weapons of one kind per Specibus, but you can just. Buy a new Specibus for your deck, I bet.