Colin Farrell and Taylor Kitsch had their guns drawn as they filmed an intense gun battle in downtown Los Angeles for HBO's True Detective on Thursday.

Taylor, 33, looked fit and trim as he raised a handgun wearing a grey T-shirt, dark blue bulletproof jacket and black cargo pants.

The actor had a short hairdo unlike his scraggly-haired TV character Tim Riggins from Friday Night Lights.

Under fire: Colin Farrell took cover behind a bus on Thursday while shooting a gun battle scene in downtown Los Angeles with co-star Taylor Kitsch for HBO's True Detective

Taylor portrays motorcycle officer Paul Woodrugh in the upcoming season of True Detective that also features Colin Farrell, Rachel McAdams and Vince Vaughn.

Colin, 38, wore a long-sleeved grey shirt, bulletproof vest and blue jeans for the gunfight scene.

The actor has grown a thick mustache and also gained some weight for his role of detective Ray Velcoro.

Urban combat: Taylor checked his gun while filming the shootout

Taking a break: Taylor and Colin relaxed in between scenes

The cable channel described Velcoro as 'a compromised detective whose allegiances are torn between his masters in a corrupt police department and the mobster who owns him.

The True Detective cast has been filming gunfight scenes downtown for the past few days.

Rachel, 36, was spotted filming on Wednesday and suffered an arm injury as she was seen rubbing her elbow.

Shooting stance: The former Friday Night Lights star looked fit and trim while raising his gun

It didn't look to be too serious as she was able to raise a smile.

Rachel portrays Ventura County Sheriff's detective Ani Bezzerides 'whose uncompromising ethics put her at odds with others and the system she serves.'

Vince Vaughn stars as the lead antagonist, Frank Semyon, a career criminal trying to go straight but coming up against a few obstacles on the way.

Gained weight: Yoga enthusiast Colin gained weight for his role in the HBO drama series

Their lives become intertwined when they are all caught up in the murder of a city manager in a case involving the criminal underbelly of society.

The first eight-episode season of True Detective starred Oscar-winner Matthew McConaughey and Woody Harrelson and was set in Louisiana.

The critically-acclaimed anthology series created by writer Nic Pizzolatto will have new cast ensembles each season.

The second season will debut later this year.