No Crying While You’re Alive

Farming + transmigration + strong heroine + no romance + modern woman in ancient times + firearms + building a home. A special forces soldier is betrayed by her organization during a mission and inexplicably transmigrates to a parallel world. Her entire arsenal and ammunition supply come with her, and she lands in the body of a marquis's daughter, only to be despised by the family for being a girl. In the end, she discovers that her transmigration was only the beginning of a conspiracy. There is no male lead in this book, so if you're looking for romance, please move along.