Geissele 2 Stage Trigger Curved 4.5 lb Pull Black. These drop-in Rifle Triggers are easy to install and provide an immediate improvement over factory trigger systems giving you a crisp reliable trigger pull that you can feel and control through the entire shooting process. This helps you place your first shot and follow-up shots as accurately as possible as you can clearly feel the break between the two stages and when you fire the shot. Pick up the Geissele 2 Stage Trigger today to take your AR15 to the next level. Specifications for Geissele 2 Stage Trigger: Manufacturer: Geissele Color: Black Trigger Shape: Curved Trigger Pull Weight: 4.5 lb Trigger Pin Size: Mil-Spec Hand: Ambidextrous Gun Make: AR Platform Gun Model: AR-10 AR-15 Gun Type: Rifle Condition: New Package Contents: Geissele Automatics Tactical 2-Stage Trigger 1TO-TRA-G2S What firearm models does the manufacturer say Geissele 2 Stage Trigger is compatible with? The manufacturer says that Geissele 2 Stage Trigger is compatible with AR-15 AR-10Geissele 05-145: 2 Stage Trigger Curved 4.5 lb Pull Black