Caliburn Matrix II Darts – Soft Tip – 90% – M2 – Black – 18g. This Caliburn Matrix II Soft Tip Dart features a 90% tapered tungsten barrel, with a milled quad grip design along the scallop section and a ring design towards the front of the barrel. The black coating defines the stunning look of this barrel. They come complete with Caliburn Dart Shafts and Flights. Caliburn Matrix II Darts – Soft Tip – 90% – M2 – Black – 16g. This Caliburn Matrix II Soft Tip Dart features a 90% tapered tungsten barrel, with a milled quad grip design along the scallop section and a ring design towards the front of the barrel. The black coating defines the stunning look of this barrel. They come complete with Caliburn Dart Shafts and Flights.