When it comes to antonyms for the phrase "sticking to guns," several phrases come to mind. For instance, "fickle-minded" can be considered as its antonym since it suggests people who change their opinions, beliefs, or decisions often. Similarly, a person who is "wishy-washy" can be considered as someone opposite to those who stick to their guns. "Indecisive" and "hesitant" are further examples since they indicate a person's inability to make up their mind and commit to a particular decision. Conversely, some synonyms for "sticking to guns" can include "resolute," "steadfast," and "decisive.