TriggerTech Drop in Triggers
"TriggerTech set out to create triggers that deliver exceptional performance without compromising safety, reliability or durability. This mission drove the design and development of Frictionless Release Technology™ (“FRT™”). FRT™ is a departure from all other triggers in the industry as it utilizes TriggerTech’s patented free-floating roller to deliver precise trigger control." -TriggerTech
Triggertech triggers are crisp and easy to use, increasing accuracy without compromising on safety.
Instruction Manuel here