You could get one down to 30lb – with lightish, but strong wheels… a set of 150mm air forks on the front (new Revs would be my choice) definitely with a 20mm axle… an air shock on the back, nout wrong with RP23 on there. Go with a light, tough chainset too and some big volume XC tyres. That bike will be capable of anything within reason…
However…
I'd agree with couple of folk above in that they are the most fun with coils front and rear, a set of burly ish wheels (though not full on DH) and a twin n bash with a 2 ring chain device.
I've got a 2006 Bullit which is pretty close to the current heckler, built up as I've just mentioned. It's around 36lb. I can pedal it around a 30km trail centre, it's a bit of a slog on long flat pedally sections and not the fastest climber, but it'll get you fit. Man, is it fun on the downs though.
Wouldn't want to XC race one, but guess if it's your only bike and you fancied giving it a shot the once, it'd get you round. Perfect for enduros though and a fantastic play bike. If my Bullit died, I'd replace it with a new heckler.
Here's my bullit for comparison…