Sorry this is so late, but I just got my power back after the hurricane.
WOW: clip
Word count: 100
Spoilers for Devil's trap.
Locked and Loaded
Dean's locked and loaded; an automatic rifle with the safety off and a full clip. His father's captured, maybe dead and Sam may not know what's needed here, but Dean does. He's like a hunting cat, stalking a circle around the demon in the Devil's trap and he's not put off by her disguise.
Sam's looking at him like he's lost his mind and Dean almost laughs. All those times his brother mocked him; accused him, and Sam actually seems surprised to finally see Daddy's perfect little soldier. Dean's a weapon and he's aimed straight at whatever threatens his family.