It could be about a gun that has some significance related to a real - life event, perhaps a particular type of gun involved in a crime or a heroic act. But without more context, it's hard to say exactly.
Hard to say. Sometimes stories like this take inspiration from real life but add a lot of fictional elements to make it more interesting. So, it's hard to determine if it's completely true.
The significance of the 12 - round gun could be in its capacity. In a combat or self - defense situation, having 12 rounds can be a matter of life or death. It might have given the user an advantage over an adversary with a less - capacious weapon.
The '12 round gun based on a true story' is quite an interesting concept. It might have been a firearm that was at the center of a local or even national news story. For example, it could have been a weapon that was illegally modified to hold 12 rounds in a place where such modifications are prohibited. Or perhaps it was a gun used in self - defense during a home invasion, and the fact that it had 12 rounds was crucial in the homeowner being able to fend off the attackers. Another possibility is that it was a gun used by a historical figure in a battle or a skirmish, and the true story behind it has been passed down through the years, but not widely known outside of certain circles.
Sorry, without further information, I can't give more details. It could be anything from a historical weapon to a modern - day firearm involved in a local incident.