Timney triggers feature precision machining workmanship and are individually tested and calibrated by hand.Timney's calvin elite series trigger is named for calvin motley timney's design genius.It features a carbo nitride coating which provides you with a high quality trigger.The wear components that are made from a2 tool steel heat-treated to rockwell 58 and with teflon-nickel coating while its lightweight 6061-t6 aluminum housing is cnc machined and anodized timney elite gold.The sear engagement pull weight and overtravel are fully adjustable.This adjustable model is compatible with your ar firearm has a red shoe and 1.5 lb pull weight.Finish: Black/GoldType: TriggerModel: Calvin EliteMaterial: Steel w/Aluminum Housing