Birdsie
The God-Emperor of Mankind
I'd rather have it be explained as some type of weapon from an ancient culture that employs the use of complex magecraft to create new, tangible bullets and shoot them. And each clip instead of having ammunition has some sort of magical dust in it... or just raw mana? No idea.How about, he saw a gun, an old style one with gunpowder, and he adapted it into what it is now?
You can go about it how you want, I'm just here to make sure it's fitting. Pweeze don't get mad at me X_X