The JARD AR Module Trigger System is a drop-in AR trigger. Simply align the housing with your AR's trigger pins and snug the internal set screws to secure the trigger system. The Module Trigger System functions much the same as Jard's ARJ trigger kit, just without the fuss of traditional AR trigger installation and with the additional option of adjustable pull weight.The Adjustable model offers the same premium JARD trigger performance with the added ability to personalize your trigger pull. Sear, disconnect, and safety engagement are all adjustable to attain a truly custom trigger pull. Trigger pull weight itself is also adjustable within 1.75 - 4.25 lbs. FeaturesDrop-In Installation and Snug Fit with Securing Set Screws within the Housing.Adjustable model features adjustment screws for Pull Weight, Sear, Disconnect, and Safety Engagement.Milled Aircraft Grade Aluminum Housing