09/25/2013 at 02:45 PM EDT
Boom! There were some mighty big guns on the set of Scott Eastwood's new movie – and not just the ones on tanks.
Clint Eastwood's 27-year-old son, who created quite a splash
after recently posing for a smoldering photo shoot in Town & Country
, has posted a shirtless Instagram photo
from the set of his movie Fury
"Trying to out flex the tank. Not workin'," the actor captioned the snapshot.
Eastwood began filming the movie, which costars Brad Pitt
and Shia LaBeouf
, earlier this month in London and will also appear in the upcoming surfer flick The Perfect Wave
"People assumed that I would have everything handed to me, but that couldn't be further from the truth," he told Town & Country
. "I was on my own just doing the grind."
And, clearly, hitting the gym.