The Spike’s Tactical Battle Trigger is a single stage Mil-Spec trigger, rounded hammer to work with all calibers, and disconnector that’s plated with Nickel Boron. This plating gives you an extremely reliable single stage trigger and it’s also one of the most grit-free trigger pulls that you’ll find on the market that breaks between 5-9lbs (depending on individual spring variance) and gets even smoother the more you shoot it. This kit comes with everything you need to replace your old trigger set. Inside, you’ll find the Nickel Boron plated trigger, rounded hammer, and disconnector; as well as brand new Mil-Spec trigger, hammer, and disconnector springs. We’ve also included stainless steel hammer and trigger pins that both feature a Black Oxide finish for durability just in case the ones you have are a little worn or if you’re installing it in a new lower!