Aluminum 6mm Metal bb pellets will are strongest bb pellets you can get for your bb gun. they don't really hurt any more than normal bb pellets when you get hit, but they look pretty cool and will set you apart from the competition as they are quite rare to find as not many airsoft shops sell them. Aluminum Airsoft BB Pellets are also great for their durability and metal BBs are less prone to deformities or breakages than other BBs, which can be beneficial for players who want more consistent performance, but on the flip side, they do not biodegrade, like bio bb pellets. Need more info? Click here to see our BB Pellet Buying Guide.