From Longman Dictionary of Contemporary Englishwith all guns blazingwith all guns blazingif you do something with all guns blazing, you do it with a lot of energy, determination, and noise → gun
Examples from the Corpus
with all guns blazing• Ewood Park is a lucky ground for them and in the first half they went for Blackburn with all guns blazing.• Kasparov has won, but Karpov went down with all guns blazing to an honourable defeat.• Naomi has moved in, with all guns blazing. 