Orlando Bloom sweats tank top muscles body

After seeing Orlando Bloom in this tight black tank top, there's no question that he's packing heat. Check out those guns!

The daddy of one let his wavy brown hair go wild as he left the gym looking fit as a fiddle. Miranda Kerr is one lucky gal.

Bloom is set to star opposite Djimon Hounsou in the upcoming film Zulu which is set in post-apartheid South Africa. The flick, due to hit theaters in 2013, is about the murder of an 18-year-old girl ... which puts the spotlight on the Cape Town police department.

Perhaps the hunky actor is beefing up for the role!