The LaRue MBT-2S was purposefully designed and manufactured to render the greatest benefits from the legendary line of accurate rifles. The MBT-2S can also replace the stock trigger on any mil-spec AR10/AR15 lower receiver. All major components are precision-machined from S7 Tool Steel. The result of this extra effort is a glass-smooth, hyper-consistent trigger that will satisfy the most scrupulous competition shooter, but also be overly rugged for the battlefield. The MBT-2S breaks crisply at 4.5 lbs (2.5 lb first stage, 2 lb second stage) and has a smooth and positive reset. Each trigger comes with an additional "heavy" trigger spring that increases the pull weight to 6 lbs.