Why does it look like a double barrel shotgun but merged we are pistol making it a double barrel pistol

This is my type of gun I like to make

This is so cool these people made the own Halloween costumes

I had permission from one of my friends that's a furry to post this

These two would be friends

Honestly ok

I'm the master of seasons

Teenage Mutant Ninja Turtles and turtles power

Me

Why do they look so similar?!