Just a month ago, a 3D-printed lower receiver was put to the test by Michael Guslick, who wrote on an AR-15 enthusiast web forum that he was able to assemble a working model of the rifle with a receiver printed on a Stratasys model printer and to fire 200 rounds without any sign of wear on the printed piece.
In contrast, many conservatives seem to have macroeconomic policy views that seem like common sense but are hard to square with empirical reality or assemble into a coherent economic model.
With those criteria in mind we dug deep into the available data to assemble the accompanying slideshow of 10 model-year 2013 vehicles that, with proper attention, can reasonably be expected to keep up with traffic for at least 250, 000 miles.