Just saw these pictures from a shop I've dealt with in the past. It seems that BUSA sent him three of these before they launch them at SHOT show (by accident as he did not know what these were).
Spoke with LTT and got the 411. Basically LTT approached BUSA three years ago with their idea and BUSA turned them away. Now they are putting out an RDO ready pistol but the factory solution is no where near as low as the LTT option. Also, it is not compatible with the LTT mount.
Not cool Beretta USA....