The elf drop-in match trigger has been built for performance.The only ar- 15 trigger using aerospace grade sealed bearings, making for an incredibly smooth and fast trigger pull.Pull weight is so easy to adjust it can be done in seconds without removing the trigger from your lower receiver.It is made of wire edm machined, hardened a2 tool steel and lightweight aircraft-grade aluminum.Finish: Black/RedType: Drop-In TriggerModel: Match TriggerSize: AR-15Material: Aluminum/SteelTrigger: 2.75-4 lbs