Should a bunch of the turrets have seemingly double entries in the Factoriopedia? For example, there is Gun Turret MkII (Recipie/Item/Entity) and Gun Turret MkII (Entity).

What version of the mod are you using? This has recently been fixed

1.0.4, dated 2024/8/20.
I'm not sure what you mean by recently fixed. I do see the changelog entry but that was over a year ago. Maybe a recent Wube update has broken something? Some more info for you: I tested this bug after removing all my mods and it was still there. Also, I am playing Factorio 2.0.60 but WITHOUT Space Age enabled. Quality and Elevated Rails are enabled but not SA itself.
I don't know how to share saves nor screenshots in this mod portal. I do use the Factorio Discord server though.

changelog for 1.0.4, 2024/8/20.
...
"- Fixed duplicate recipes in factoriopedia"
...

We are talking about duplicates of turrets in the factoriopedia. The recipe and object were displayed as a separate item. In 1.0.4 duplication is fixed - checked in a local game.

Perhaps you have other mods that changed objects in the Rampant Arsenal? If so, then when you hover over an object in the factoriopedia, a list of mods that changed the object will be shown

Also, you can provide your save

As per my 9/1/25 post: "...I tested this bug after removing all my mods and it was still there."
Also as per my 9/1/25 post: "I don't know how to share saves nor screenshots in this mod portal. I do use the Factorio Discord server though."

No, no. I didn't mean a screenshot. I wanted to get a save file, loading which I will load your mods and their settings. And I will be able to see the duplicates you describe. I just don't see them in my saves.

.

You don't know how to upload a file to a file sharing service and send a link here??
Then, unfortunately, since I can't reproduce your situation, it is impossible to solve it

I've already mentioned that I have Discord. I also sent a Friend request several days ago.

Dude does Dimm owe you money or something ? Chill the hell out my god, this was painful to read

At least my responses were trying to get something useful done, as opposed to being a useless whine like yours.
At the time, I did not know that this portal does not offer a way to share a save file. It would have been nice to have simply been told that.
Dimm does not owe me money, and I appreciate the great job he has done in taking the time to write several awesome mods (not just this one).

While editing/troubleshooting the My QuickStart mod (this lets you begin the game with more stuff in your inventory), I noticed one of those Unknown Key errors for the Advanced Beam Turret. According to a mod dev helper in Discord, this is because the entity-name and the item-name of the Advanced Beam Turret do not match. I get an unrecoverable error when I use entity name "advanced-beam-electric-turret-rampant-arsenal" in the My Quickstart code lines for customset and insertItem, but everything works fine when I use item name "advanced-beam-item-rampant-arsenal".
Could this be the reason for the Advanced Beam Turret having two entries in the Factoriopedia?
I'm using version 1.0.4.

Update: I got rid of the Unknown Key error by going into your locale.cfg and adding the line "advanced-beam-item-rampant-arsenal=Advanced Beam Turret" in the [entity-name] section.