I have had several orders from them and Omega who must be affiliated & 0 problems .I once received a LPK and the hammer has a j spring which was not seated so when installed it hit the receiver and they sent a replacement and a new grip screw as that kit also had a messed up screw .Omega forgot a bottle of clp and I wrote and they sent it out. I have friends who say they got burned on uppers with them . But I buy my uppers from BCA and they have nice stuff but customer service is abhorrent. I cannot say I have ever had a bad dealing with delta and I buy a fair amount of stuff