Jake Gyllenhaal Strapped and PACKING HEAT

7/28/2011 9:29 AM PDT

Jake Gyllenhaal Brings Out the Big Guns

Looking tough with his shaved head, Jake Gyllenhaal brought out the big guns to portray a cop on the set of his new flick "End of Watch" in L.A. the other day.

Jake is definitely bulletproof.