This stuff looks absolutely devastating! Very limited supply currently and only available in 9mm but plans include 380, 357SIG, 40S&W & 45ACP in the coming months. On solid objects they claim (and show) how it rips through the material like a hole-saw. Materials include plate glass, windshields, sheetrock, sheetmetal, cinderblocks, heavy denim, etc. On soft targets (the human body) the outer 8 trocars literately expand and split off creating 8 separate wound channels cutting vital organs to increase the incapacitation rate as the main projectile continues through for a 16" penetration.
I know *I* don't ever want to be hit by these things! My thinks I'd choose a standard HP or FMJ to get hit by myself. At $44 for 20 rounds the typical thug likely will not be carrying them!
I'd like to get my hands on some though I'm told there is a long back order at this point. They can only produce 60,000 a month at this time.
http://g2rip.com/scroll down the main page for a pretty detailed video.