Delta Team Tactical / Omega Manufacturing & Davidson Defense are all the same company. They ship products out very poorly in USPS priority envelopes that do not protect the items well or at all. Product are Cheap Chinese items are times that are not tested or confirmed for quality but expect the end user to assume all responsibility and they do not back up the products by any means. Purchased BCG + Charging handle combo charging handle wont even go in the the upper receiver. Purchased multiple buffer tube kits was told to grind the tubes my self or mod would not take the products back and lastly I purchased multiple receivers from them. These receivers and multiple other products are shipped in USPS priority envelopes thought nothing of it but now that I am trying to use these items well the BCG will not go into the product at all & due to the shipping method they use the item / s have stress marks on the sides. So outside of this having 2 issues with damage and that the BCG will not go into the product as from my dealings with them it always falls to the consumer to take the loss. No such thing as a lifetime warranty free of defects or sorry we use use a shipping methods that does not protect your purchase. So again I don't expect this same company to provide real customer service or resolve the issue but clearly expect the answer to be thanks for the free money, good luck.