How do you get an object to spawn in a specific weapon but with the attachments and skins

Question

I am a VR developer but never had to code thanks to the tools readily available but now i have decided to make my own game and learn C# i have looked here and there but cannot find a definitive answer. To be more specific player is in hub and makes adjustments to a weapon that is in my game. Player doesnt start with this weapon, should player interact with an object that can spawn this weapon how do you make it spawn in to them with all the attachments and skins they added back in the hub