This tactic is only proven to work in Search and Destroy on big, wide open maps. It IS NOT proven to work in any other game mode or maps!
man 1: riot shield
man 2: sniper
man 3: support
this is a tactic derived from something me and two of my other friends do together on big, open maps.
the riot shield would walk out into the open and wait to be shot at, when the riot shield is shot at the sniper shoots the target shooting at the riot shield. The support is normally a person who has an assault rifle with an ACOG. In this tactic, as apposed to "4-5 man tactic #1" the person with the riot shield is an offensive tool, not defensive.
The sniper has the choice of making the class they will be the best with.support
Any assault rifle with an ACOG
The support would normally be in a building, or a decent distance away from the riot shield and sniper. thus needing an ACOG. he would only engage a target if the target was not seen by the sniper or riot shield and/or behind the team.