Abstract: A clip applying apparatus is provided for connecting plastic clips to reinforcing bars. The clip applying apparatus will generally include a barrel, a hammer received in the barrel, and a main drive configured to reciprocate the hammer within the barrel. Other features may include a safety shield as well as a lockout lever which prevents proximal movement of the safety shield if a clip is not fully received within the barrel. Another feature which may be included is a clip door operably connected to a sliding-pivot channel defined in one of the barrel and the clip door. Still other features may include at least one guide slot disposed within the barrel to direct hammer movement, and a hammer bushing coaxial with the barrel to support the hammer.