Abstract: A modular external fixation system includes a plurality of modular components, each formed of a non-metallic material. One of the modular components is a modular rod that is provided in a single initial length and then cut to a length appropriate for a particular external fixation procedure. Another modular component is an interlocking element that can be mounted on one end of the modular rod and that includes an interlocking feature for engagement with other modular components. The system can also include a distraction arm that can be mounted at one end of the fixation framework. The arm includes a bar portion configured to be grasped to apply a distraction force along the construct. The arm can be pivotably mounted so that it can be pivoted to a distraction position, or to other positions, including one position in which the arm bears against the foot of an instrumented leg, and another position in which the arm acts to support the entire leg.