Don't skip this - JP Enterprises SCS System Buffer Retainer Pin & Spring Kit

If you are buying a JP silent captured buffer spring this is not necessary, but don't skip it, it will make your life so much easier! Removal is so much easier with this pin. JP mentions you can run without a retaining pin, but this is a great way to retain the pin and have easy access to the buffer as it doesn't get stuck like the stock one.