A pin & flank is the most basic tactical solution to taking out an opponent who is behind cover. Usually, you will decide to execute a pin & flank for one of two reasons: either the opponent is firing on your position and you can’t poke your head up to return fire without being shot or you’ve got a group trying to fire on and eliminate an opponent but the cover they’re hiding behind is preventing you from taking them out.
A pin & flank requires at least two people and is better (like most tactical situations) if you have at least 3-4 teammates taking part.
Divide up your group into two fire teams. Have the first fire team (we’ll call them Alpha for this example) start to lay down suppressive fire. Suppressive fire means that the members of Alpha are all up and firing, but they probably don’t need to fire more than once every second or two. This will help them conserve ammo. In real life suppressive fire usually entitles several hundred rounds of fire, but that rate of fire doesn’t usually become necessary in combat sports like laser tag.
Send the second fire team (we’ll call them Bravo for now) circle around to the side of the target. The goal is for Alpha to cause the opponents to keep their heads down (or pin them) so that Bravo can find another angle where they have a clear shot (by flanking them).
In general you probably want Alpha to be the larger of the two, but circumstances may require more strength with Bravo. If, for instance, Bravo expects to fall under fire from additional opposition forces (usually called OPFOR for short) then Bravo needs to weigh whether they can find another approach (which is preferable) or whether they will risk engaging the additional OPFOR. Engaging opponents other than the target is a big risk because a) the target may realize what’s happening and attempt to escape and b) if Bravo is eliminated Alpha will have a larger firefight on their hands at a big disadvantage.