The Tyrant Glock Gen 3/4 I.T.T.S., aka Improved Tyrant Trigger System, is equipped with high-performing features, making for an ultra-effective tool with a greater level of efficiency and precision than other standard carry triggers.Features :30 Percent Power Spring Ensures Lightning-Fast ResetsCurved Features Allow for Taller Trigger and Greater Comfort for Users with Larger HandsMade with Set Screws in Lieu of Pins to Boost Strength and SturdinessFits Glock 17/19/22/23/24/26/27/31/32/33/34/35/37/38/39 Gen3/4