Well, so far with all the information that has been given to us with the 3 currently translated chapters is that, a former bullied dude gets resurrected after getting owned by the past bully in a fantasy world with beastman people and such. But the sad part is that he got NO talent in the new MAGIC DOMINATED world, were basically if you got low magic you are TRASH. And this is exactly what happens to our "OP Protagonist To Be". Then he learns that METAL SLIME(reference to dragon quest) have the particualar drop of metal liquid that based on mental image can create metal related works. And our "OP Protagonist To Be" Is a gun otaku... In this world where magic is the law we got our protagonist that mostlikely will become a gunsmith and a gunfighter.

This manga is not really a 'highlight' manga or something amazing, it's just your everyday isekai twist with the ecchi and harem aspect too. Loser MC gets reincarnated to OP MC blah blah blah. It's a short read, but I ADVISE YOU TO CONSIDER other options before getting to this, mainly because the ending is not even a good ending! Even if the ending was rushed, it could have been executed so much better

Reason for me to be pissed:

I was expecting something like "Oh we fought the main villians and saved person to be saved!!!" but no it fucking ends while they are mid battle shouting "Peacemakers charge" like wtf? All that story building to just slap me in the face like that?

Its shit because the MC is a loser and the people around him are idiots who even forgive traitors. It can't be more Japanese than this.

Somewhat decent, the story is nothing new and it's not really very interesting in how it's been presented so far but I like how meticulous the author was to actually invent and explain a plausible reason (for an iseakai) for which the MC would be able to make his own guns in a new world without them, also, he takes over a decade of practice and learning to pull it off. Even more interesting, he MC does not have any specific advantage (so far) over others, no cheat skills, no special invisible teacher, no game system, no special items, nothing, other than his knowledge of weapons he's just normal, he's even a failure as a magician.

Unfortunately, that dedication does not extend to all aspects of the manga. The author is detailed and concerned about coherence in some aspects yet is so inconsistent with others, like a guy surviving a point-blank shot to the head with a shotgun,

or how a Duke and his wife would accept their daughter to marry their previous slave, and not even as 1st wife . Same thing can be said of relations, albeit I knew the author was not going to be able to go against his nature and introduce harem there are ways to go about it, it was actually going well till ch 9 ! the author took 9 chapters to develop a sweet relationship between the MC and female lead only to destroy it by having her ask him to make her his sex slave... that's a virgin otaku writers take on love-come... fortunately he keeps it at comedy, still, I don't find sexual slaves to be a funny thing.

In short, a mix of mature and immature approaches in the story telling and thus an un-even story that is serious and makes sense at times and is the oposite at others.

Gun otaku gets killed by a murderer instead of trukkuned and reincarnates in a world where he is the underdog, but manages to create guns thanks to metal slime. Girls are cute and fanservice is good. I usually do not like isekais but this one works for me! Above average rating for now since still ongoning. Also drawn by a hentai artist, we are not here for romance, go read otome trash for that.
Do not listen to the fake geeks below and try it!

Story is shit. Characters are pretty dull. Just another damn ecchi. But, I enjoyed it. I have no idea why.
It's garbage on a review but this kept me entertained. Personally, ecchi isn't my thing. I prefer a romantic comedy. BUT, the comedy has to be funny. Just romance is usually boring as hell. This kind of ecchi stuff is usually terrible and I feel empty when I read it. This one kept me reading.

Most bad series are just bad. Read them, dislike them, stop reading them.

However, this series is so bad that it is actually painful to even read. In essence, it's just another "Reincarnated into this fantasy world" manga that, in a genre that is oversaturated with trash, is just another scoop on the pile.

Let's break it down to core concepts:

Story
It's bad. Really, really bad. Nothing about it is special. It's just another "I died and hated my life so I'm going to change it." Literally nothing about it is special. The only difference that it has is that the MC has a gun instead of getting absurdly overpowered magic/sword skills.

Art
No art can redeem this piece of work. It's generic. Women are tig-biddied girls who, despite apparently being absurdly young, still seem to have adult bodies. It's generic ecchi trash art that only appeals to 14 year old boys.

General Enjoyment
If you're the type of person who reads manga for the sake of tig ol' bitties to satiate your desires, then yes, read this pile of garbage.

If you like any sort of substance/realistic behavior in your manga, why are you even browsing this page with a description like that?

I'm still trying to hold out hope for the series, however, because I can't believe that this series is so bad. It has to be some sort of deconstruction of the genre.

That's how bad it is.