One glance, and the observant 'bent homebuider will immediately recognize the potential here. It is a Haro Comp Extreme, The frame is TIG welded, Tange, double butted tubing with a bare frame weight of 2659g.
After a litle selective surgery, I was able to trim-off 1593g. As shown below, (with chunky, 57-406 rubber, wide rims and a 950g fork), it weights 5366g (approx. 11.8 pounds)