High quality AR-15 Enhanced Lower Parts Kit from ERGO comes with all the parts to complete your AR-15 lower with the exception of the fire control group. Comes with the Original ERGO Grip (AT) Aggressive Texture included. - Included in the kit: - Armaspec SFT 45/90 Safety Selector - Bolt Catch - Enhanced Take down Pin - Stainless Steel Takedown detent - Takedown Detent Spring - Enhanced Pivot Pin - Stainless Steel Pivot Detent - Pivot Detent spring - Stainless Steel Anti-Walk Trigger Pin - Stainless Anti-Walk Hammer Pin - Stainless Steel Buffer Retainer - Magazine Catch - Magazine Spring - Enhanced Magazine Release Button