Another MBT-2S installed.... Best $94 spent for sure.

[VASCAR2]

One advantage of the LaRue MBT 2S is the package include two hammer springs, light and heavy. I can see the advantage of the heavier hammer spring if the rifle is going to used for defense or novice shooters. Unintentional discharge are to be avoided and in certain situations the heavier trigger might be warranted.