I am still waiting on a serialized polymer 80 frame. Granted I'm still within the shipping window but I don't have a lot of hope that I'll receive the item on time. I have sent numerous emails and they say that my case will be reviewed but then I don't get a reply. I have called their number multiple times only to be put on hold and hung up on. I tried going to their website, Delta Team tactical and that is a dead end as well. What's crazy is they go by Delta Team Tactical, Davidson's Defense and MMC Armory. I learned this the hard way through my own stupidity because I really wanted my serialized Frame so I ordered a second from MMC Armory which is the same as Delta Defense. All I was trying to do was get confirmation That they received my FFL information and that we were good to go. When making FFL purchases I always send and email that if there are any issues to call me.