Compatible with the collapsing blades by 3dprintingworld. Pictured blade was printed using the model from his Collapsing Sith Lightsaber.

For printing I recommend against using a brim, it will be difficult to remove from the details on the top and bottom (or take steps to ensure there is only brim around the outer perimeters). Otherwise the more perimeters the stronger the print. The weakest part is the thread, if your collapsing blade gets suck extended be careful with applying force to push the blade back in to the handle. For any advice printing the blade please refer to 3dprintingworld's helpful advice in his own models.