i just purcased a takara metal driger from ebay and i dont know what to put the heavy metal core in have you guy got any ideas.

Do you have any V or V2 Beyblades? You use their SG shells (Neo Right/Left SG) in place of the central core they come with which is a normal, MW, or MG core. They also come with some of the other Beyblades that were produced later.

yeah i have all the blade well nearly all of em

Well you just put the HMC in place of the MG core.

And if you have anymore singled question posts, use this topic for it next time:
http://forums.beywiki.com/showthread.php?tid=1295