This is just a curious question, but on ar15 rifles, DI specifically, if the bcg only rides on the upper along the 4 rails, the contact points on the key, camp pin, including the locking lugs. What's the point / focus cleaning the ENTIRE bcg save for inspecting wear patterns, looks, and I suppose precision too if you're using an upper for that purpose.
From what I understand we're not shooting corrosive ammo and most coatings protect from the elements with some saying the carbon acts as a protectant / lubricant in of itself. That and it's what most people were taught in the military. However, in a lot of videos comparing one finish to another I see a lot of focus on cleaning the entire BCG when only a small portions of the entire assembly actually contact the rest of the rifle.
From what I understand we're not shooting corrosive ammo and most coatings protect from the elements with some saying the carbon acts as a protectant / lubricant in of itself. That and it's what most people were taught in the military. However, in a lot of videos comparing one finish to another I see a lot of focus on cleaning the entire BCG when only a small portions of the entire assembly actually contact the rest of the rifle.