This is a surprise. It appears to be a new figure line from kotobukiya, and they are not model kits. These appear to be another modular joint system, similar to the geneblock system if you are familiar with that.

This entry is the Full Metal Panic! TSR Arm Slave Series Arbalest. 150mm tall (a little over 5 inches) and very affordable at 839 yen. Unfortunately not due till 10/2009.