The ELF Drop-In Match Trigger was originally built for law enforcement and military duty but is now available to civilians. This trigger uses aerospace grade sealed bearings, making for an incredibly smooth and fast trigger pull. Our exclusive .043 double wound polished piano wire hammer spring ensures full ignition of any ammo. Pull weight from 2 3/4 to 4lbs is so easy to adjust it can be done in seconds without removing the trigger from your lower receiver. A second-to-none AR-15 drop-in trigger system that is strong and light, made of wire EDM machined, hardened A2 tool steel and lightweight aircraft-grade aluminum. Installation can be done in minutes using your ARs original hammer and trigger pins. The Match trigger may be ordered with a curved or straight shoe.