I was putting together a lower last night and everything was going great until I got to the buffer retainer and the buffer retainer spring. I had the buffer retainer but was missing the spring. I tripled checked everything on the table and under the table and also had my wife check too but I'm certain it was never in the LPK I got from White Oak Armament. I tried calling and emailing them but no response. Is there somewhere local I can buy one without driving 50 miles from Bowie /crofton area? Thanks