I have one of these big boys, it's full metal and pure nasty. Take down is a bit iffy because to put it together you might need to get agresively persuasive. It's not the most accurate riffle out there, it's uber heavy and a little long. But hey it's a barret and so I love it.
I Havn't yet summed up the plums to skirmish with it, but i will do.
Assuming my arms are still attatched after lugging this great lump about I will report on it's field performance soon.