Geissele Automatics 05160 SSA-E Two-Stage Curved Trigger with 2.90-3.80 lbs Draw Weight & Black Oxide Finish for AR-PlatformThe Super Semi Automatic Enhanced (SSA E) provides enhanced trigger control and weapon accuracy while maintaining the robustness and reliability. The reduced first and second stage pull weights result in a trigger with a smooth, light first stage take up and a crisp, candy cane like second stage break.