Timney Triggers feature precision machining, workmanship and are individually tested and calibrated by hand. Timney's Ruger 10/22 Trigger sets the standard for aftermarket trigger upgrades. It is constructed of a one-piece CNC machined 6061-T6 aircraft grade billet aluminum. The trigger, sear, and hammer are wire EDM cut and heat treated steel for exceptional durability and has an auto bolt release. This model has a black housing and shoe.