Doushitemo Hametsu Shitakunai Akuyaku Reijou ga Gendai Heiki wo Tenishita Kekka ga Kore desu

So it seems there are a lot of isekais recently, with a girl being reincarnated into an otome game.

We've had Bakarina, but what if she was (American) a gun nerd instead? (and also less dumb?) - This.

The MC gets reincarnated as an Antagonist of a game she played before and wants to prevent her doom. It's nothing new, but I had fun so far. You don't get real depth here either, it's just a girl with guns. And magic.

She's also very skilled at magic, but that's not really needed - she just uses magic to be better and faster at shooting guns. There are no twists here, the story is predictable and yeah...

I give it 6/10

This manga is not good at all. In fact it is very bad. I think the idea behind this manga was "What if we reincarnated, but I make guns?" This manga is about as flat as this idea. This entire premise is the only thing that this manga ever presents. The main character is terribly written with her only apparent motivation ever being the fact that she really likes guns. It appears that there are attempts at comedy but this cant be confirmed as it never really hits the mark. Any time there is a hint at a joke it is overshadowed by the reminder that the main character has a gun.
The story is also dreadful. Their are attempts at conflict but from the get go it is explained in the title that the protagonist intends on solving every problem with guns. And as it turns out this makes for a very boring story. Why even bother to have conflict when the protagonist just shoots any opposition. I have one problem though because that sounds kind of interesting, and the story cant have that. The reality is that there is no conflict that cannot be solved by shooting it with zero backlash. If there would be some greater conflict formed by shooting something, then that conflict doesn't exist in the first place. There is no depth to the story and it is terrible.
The art is mediocre and there isnt much to say about it.
There are some final things that really bothered me that didn't fit in elsewhere. The first of which is that this story is entirely about guns yet there is zero detail about the guns or how they are made or anything. Everything is just hand waved away saying this is a pistol but not even giving it a name. Really disappointing that you couldn't even give detail about the one portion of the story. The other glaring issue to me is that the author pushes romance so heavily on the characters, with the character being either 4 or 6 years old. 4 years old can be considered a toddler. Why are they acting like they are over a decade older. Just make them a decade older if you want them to be 16 or 18. It would change absolutely nothing about the story.
Overall this manga is terrible it is not worth reading.