Get That Revolution Started

A sniper team is composed of a shooter and a spotter. A spotter is someone that helps him identify targets, and watches their back and the shooter executes the plan. In law enforcement circles, the tactical team is known as Sierra (Shooter as in a high vantage point) and Scorpion (Spotter). The reason for this designation is that the decision to make the kill shot comes from the latter, not the one who fires the weapon. It is a form of "distribution of responsibility", so the shooter does not have to live with the guilt of taking a life.

Raines says the sniper rifle is a DSR-1 used by the Belgian Armed Forces. A search shows the Belgian Armed Forces, specifically the Land Component, has never used this sniper rifle, although NATO members might have shared it.