Armaspec .223/5.56 Superlight Lower Parts Kit - Black - Armaspec Stainless Steel Lower Parts Kit, minus trigger group and grip, for 223 Remington/5.56mm NATO. If you are looking for a high-end lower parts kit, than this one is for you. It incorporates all the great products from Armaspec in one package and is compatible with most AR-15 platform lower receivers. The Superlight Lower Parts Kit contains one each of the following: Armaspec SFT 45/90 Safety Selector Bolt Catch Armaspec Superlight Enhanced Takedown Pin Stainless Steel Takedown detent Takedown Detent Spring Armaspec Enhanced Pivot Pin Stainless Steel Pivot Detent Pivot Detent Spring Stainless Steel Buffer Retainer Magazine Catch Magazine Spring Armaspec Enhanced Magazine Release Button Stainless Steel Bolt Catch Detent Stainless Steel Safety Selector Detent Bolt Catch Roll Pin Bolt Catch Spring Buffer Retainer Spring Selector Detent Spring Armaspec Enhanced Trigger Guard Trigger Guard Roll Pin Trigger Guard Set Screw Grip Lock Washer Grip Screw