Named for its' handle design. Very slim and sleek and can be very lightweight. Below are a few examples of this  popular and easily recognizable model. Bullets start at $375 for manually operated models and $425 for autos.

Mammoth Ivory Bullet

The Bullet above has a 3 1/2" BG 42 stainless steel blade
and is done as a button automatic. 
The frame is heat-colored titanium. 
Mammoth ivory handle scales. 

Base price with 440c or ATS34 blade, wood or micarta handle
$550

As Shown
$700

Damascus Steel and Jade

The bullet automatic shown below has 4" damascus blade and bolsters. 
Scale release automatic.
 Fileworked damascus steel butt spacer. 
Wyoming jade handle scales. 

Base price with 440c or ATS34 blade, titanium bolster, wood or micarta handle
$525

As Shown
$1000