His weapon is hit and he turns and runs out the door (look for sparks when rounds hit his weapon).
He is killed when he runs outside (this happens off camera).
Insurgents inside the house shoot the ANA soldier through holes in the front of the building.
The Special Forces soldier neutralizes the threat.
Answer: Most of the time it is anything they want. Special Forces has been described as a team of military guys all wearing different gear. During my time on the SEAL Teams I was issued a pair of black Danner boots similar to the Danner USMC Rat Temperate Boot