I would like to amend my review of the black nitride BCG. Yes, the product was not staked and there may be a slight bolt/bolt carrier fit issue but after writing this review I emailed 3CR Tactical about the issues. As I purchased this over a year ago I expected to be told that it was too late or nothing at all. Instead, when I checked my email early the next morning I already had a return shipping label from them. I am impressed! It did not come with any specifics about their course of action (fix, replace, refund, etc) but just the fact that they immediately addressed my issue over a year after my purchase was impressive. I would prefer a fixed or replaced product but even a refund would be acceptable. I'll just use it to buy another FROM 3CR Tactical and plan to use them exclusively in the future. Smith and Wesson could learn a few things about customer service from this company. Despite this BCG slipping through I have changed my rating to 5 stars because I am confident that they will make it right.