An amazing bcg to buy if you want an to replace the stock.that comes with the lower you buy! - Lantac Enhanced Full Auto Style Bolt Carrier Group (BCG) w/ NiB Coating

I've got nothing but flying colors for this BCG. It just as easy to disassemble this piece as any other BCG, but those are the only similarities. It is amazingly easy to clean, see as the carbon is easy to spot. My only con is that after shooting around 100 rounds with it, the color isnt as shiny, so expect some distortion to that effect, but other than this piece works beautifully.