I see you're using the same weapon system as in the classic Karlson demo. Is it a YouTube tutorial? I want guns like this too!
I'm not using anything from Karlson, I think I self made that system in like a day during the original jam it was taking place for, I don't remember if I based it off some tutorial because it was more than 2 years ago, but I think any semi-popular (10k+ views on youtube) tutorial should get you started nicely