This ATI AR-15 spare parts kit for sale is high quality. Keep this spare parts kit on hand during your next AR-15 build it is perfect for replacing your crucial lost part. This AR15 spare parts kit included 4 Take down Pivot Springs, 2 Safety/Ejector Springs, 2 Buffer Retainers, 2 Buffer Retainer Springs, 3 Takedown/Pivot Detents, 2 Safety Detents, 1 Bolt Extractor Spring and 2 Firing Pin Retaining Cotter Pins. The Perfect small parts pack to keep on your work bench or in your range bag. One year limited warranty.