The RISE Premium Lower Parts Kit for AR-15s isn’t the standard LPK. It includes all the essential pins springs and hardware to complete lowers but what sets it apart are the premium RISE Armament components that elevate rifles performances and usability from the start. *Includes: RISE Ambidextrous Safety Selector with captured detents interchangeable paddles and a 69-degree throw (1) RISE Enhanced AR-15 Takedown and Pivot Pins with concave faces beveled edges and tool-assist cavity (1 of each) RISE AR-15 Trigger Guard with swing-open design and aircraft-grade aluminum construction (1) RISE AR-15 Oversized Magazine Release Button with enhanced texture for improved control (1) RISE Enhanced AR-15 Bolt Catch for reliable lock-back and easy release (1) AR-15 Magazine Catch (1) AR-15 Trigger Pins 5.56 (2) Safety Detent Pin (1) Safety Detent Spring (1) Takedown/Pivot Pin Detents (2) Springs for Takedown/Pivot Detents 5.56 (2) Spring for Mag Catch (1) Bolt Catch Spring (1) Bolt Catch Plunger (1) Bolt Catch Roll Pin (1) Buffer Retention Pin (1) Spring for Buffer Retainer 5.56 (1) Trigger Guard Pin (1)