I thought the AR20 was designed for FT, this would be a sub 12lb, 10mtr is done with 6lb, please correct me if Im wrong.
It does look a great bit of kit though, and I did chat to a chap who was at Harriers FT a while back who was shooting one and he loved it, the only thing he was not over struck on was plasticy looks and feel, it seemed to shoot ok though
Mick