SOLVED. YA Zombie Apocalypse (I think? Seemed like it at the time) Where the character is a girl who has a glock she does not want to lose and I read 8ish years ago (2016) and seemed like a newer book at the time (More below)

[M]

I'm sorry if this is not a good enough description, but it is all I can remember. I was also not sure how broad a spoiler could be so I wanted to be safe. This is my first post and I am really bad at remembering these but wanted to find it to read again. Anything helps and I really appreciate it! Either dystopian or YA fantasy and I remember that the book covers are all black and the titles were all single words (I think) colors were red, blue and green (it is a trilogy) I believe at one point that she does find safety.

[M]

I found it, Ashes