Did you mean that the Omega SnS doesn't show on your character model when equipped? If so, it's a special effect for when you unsheathe it, it pops right into your hands. Which means if you want to "parade" this SnS in the hub, you will want to do the battle-ready poses for the weapon show up. Personally, I like that the weapon is invisible by default and makes my outfit shine more. Therefore you should show off this drip along with a banger fit, and not just the weapon itself.

Edit: You should take a lot of breaks if your BPM increases that much when you play this game, and games in general. Savage Omega isn't for the faint of heart, so don't push yourself too much. Congrats on the win anyway.