Patriot Ordnance Factory Drop-In Trigger System, Straight, 3.5 Pound Pull Weight, Includes Trigger, Disconnect, Hammer, and KNS Pins 00858 This single-stage" non-adjustable" drop-in trigger boasts a solid 3.5-pound pull weight and is pre-assembled in a Hard coat Anodized aluminum housing (complete with rubber urethane feet) for immediate competition" hunting" and tactical applications right out of the box. Carved from American A2 steel" the Trigger" Disconnect" and Hammer are all Nitride Heat-Treated to 70 Rockwell case hardness for ultimate strength and corrosion resistance.