Its interesting that the Duty 4.0 in 1911, single stack ($1330.00) is a bushing barrel while the Duty 4.0 in 2011, wide-body ($2045.00) uses a bull barrel. I'd be interested to try the 2011 4.0, but for my money, unless you just gotta have that rail and the grip checkering, if you want a 1911, I'd stick with the Ranger II with the bull barrel ($1135.00). I love my Ranger II in 9mm.