The Timney Triggers 2 Stage AR-15 drop in trigger has set the standard for aftermarket trigger upgrades for the AR-15 platform. This drop in, complete assembly trigger is factory tuned for a short first stage set at 2 lbs. with a 2 lb. second stage. Installs easily with no gunsmith needed. Features: Installs with your rifle's original hammer and trigger pins Range ready with no adjustments needed Designed for those who prefer short-pull two stage triggers