I don't need a lot, but if anyone has any experience firing an M-4 or similar military-style rifle... can you help me out with some little details? I've fired hunting rifles, so I understand the general principles - what would be different? Also, my character is an ex-marine, current police officer, fighting a fairly intense battle in his police officer uniform (some version of fictional Montana sheriff-ness). Are there any little details that might twig for him - I assume his current gear would be lighter, so maybe he'd feel more mobile, but also more vulnerable? I don't need much, just a few little details to make things feel authentic. Thanks for any help!