AIM Sports Inc AR Complete Lower Parts Kit Black Small. Just add your favorite lower and stock kit for a complete lower receiver Specifications for AIM Sports Inc AR Complete Lower Parts Kit: Manufacturer: AIM Sports Inc Color: Black Gun Make: AR Platform Included Accessories: Magazine Release Assemebly Front and Rear Receiver Lock Pins Bolt Catch Safety Switch Trigger/Hammer Assembly Trigger Guard Pistol Grip Package Contents: AIM Sports Inc AR Complete Lower Parts Kit Black A2 Pistol Grip Pistol Grip Screw & Pistol Grip Lock Washer Trigger Guard Trigger Guard Roll Pin Standard Trigger Trigger Spring & Trigger Pin Hammer Hammer Spring & Hammer Pin Disconnector Disconnector Spring Safety Selector Selector Spring & Selector Detent Bolt Catch Bolt Catch Spring & Bolt Catch Roll Pin Magazine Catch Button Magazine Catch & Magazine Catch Spring Front Pivot Pin Pivot Pin Detent Spring Takedown Pin Take Down Detent Buffer Retainer Pin Buffer Retainer Spring AIM Sports Inc ARCLPK: AR Complete Lower Parts Kit Black Small