The Wilson Combat TR-TTU Tactical Trigger Unit is a precision-engineered two-stage flat trigger featuring an optimal 4-4.5 lb pull weight straight out of the box with no adjustments required.Wilson Combat TTU Two-Stage Flat Trigger4-4.5 lb trigger pull weightDrop-in installation with no adjustment screwsCNC precision machined constructionH13 steel with dry film lube finishPositive trigger reset designTwo-stage operation for enhanced accuracyIdeal for competitive shooting and tactical applications this trigger delivers consistent performance and reliability with advanced engineering that requires no user modifications or tuning.