Just like the standard mbt-2s, it's cnc-machined out of solid s7 tool steel.The result of this extra effort is a glass-smooth, hyper-consistent trigger that will satisfy even the most scrupulous competition shooter, but also be overly rugged for the battlefield.The mbt-2s-sb breaks crisply at 4.5 lbs (2.5 lb first stage, 2 lb second stage) and has a smooth and positive reset.The larue mbt-2s-sb is purposefully designed and manufactured to render the greatest benefits from the legendary line of accurate rifles.The mbt-2s-sb can also replace the stock trigger on any mil-spec ar10/ar15 lower receiver.Model: MBT-2S