The gun used to kill the very first victim is a Beretta 92FS or US Army M9. It is a double-action handgun with open hammer design. Judging by the trigger position, the pistol has already been cocked, but the hammer is not. Moreover, we see the finger pull the trigger and the gun fire without any movement of the hammer, which is impossible in this situation.
Tripp is shown wearing dark grey/black jeans at the beginning and throughout the story. At the end, when he's sitting in the ambulance the jeans are suddenly blue.
Weinstein: We always said that we would bail on any job if the intel sucked. Already the vault specs are shit, we're behind schedule, our number 3 guy Lancelot is a fuckin' psycho. We got two hillbillies in the lobby playing with weapons-grade plastic explosives, our faces in the the open. Ten years ago we would have bailed, you know I'm right.