The ELF Drop-In Match Trigger has been built for performance. he amazingly short take-up, glass-rod crisp break and next to zero over-travel can be compared to the finest custom 1911 triggers. Adjustability puts you in charge based on your current use. If you are looking for the finest adjustable trigger for your AR-15 platform, this is the trigger system for you.Features :Adjustable from 4lbs to 2 3/4lbs without removing from lowerFits any mil-spec AR-15Absolutely Drop-Safe regardless of pull-weightFinger Adjustable