One of the easiest upgrades you can make for your AR-15 rifle is the trigger. If you are building a new rifle or just improving the Mil-Spec trigger, the Timney single stage competition trigger is a great option. This AR-15 trigger group is completely self-contained drop in unit that makes upgrading as simple as driving out the pins on your old trigger and replacing it with this fire control group. This Timney trigger gets rid of the heavy, gritty, and inconsistency of standard triggers and does so with a four-pound trigger pull.