The barrel forms the main part of a dart. When we are speaking of "buying a (new) dart" we mean getting a new dart barrel. Nowadays barrels are available in almost every possible shape, with a wide selection of knurl or rings on the surface for a comfortable and safe grip.
The main tungsten dart Barrels' Shapes are:
The selection to the left shows tungsten dart barrels with 2 threads (soft tip), to the right are fixed-tip steel tungsten dart barrels.
It's not possible to say which one is the "right" one. Based on a very theoretical reasoning the long cylindrical tungsten dart barrels could be the best of them because it is the slimmest and allows the tightest grouping. Good for 140s and 180s. But this reasoning doesn't help you when you are not able to handle such a barrel. Selecting the right shape is a matter of personal preference. Choose what feels comfortable for you. This is much more important than an abstract or "academic" reasoning about theoretical advantages or disadvantages of some shapes.
We appreciate very much to receive your particular designs, and always try all out to meet any specific requirement. The motto for our company is that, there never be minimum order, but any one could bring to us the most potential buyer.
If you have any interest in our tungsten dart barrels products, please do not hesitate to contact us by email firstname.lastname@example.org; email@example.com or telephone 86 592 5129696.