Anybody seen one up close. I did today. Cool concept if you like modular designs. You can swap the barrel in a minute or two. And the mag well can be quickly detached.
A barrel in another caliber can be installed and well as the mag well to accommodate the appropriate magazines.
The rifle looks to be very well made. Their website shows a 308 conversion as well as several others.
The rifle in the 5.56 configuration was $1200. Not too bad I guess.
MGI: Modern Upgrades for Current Military Small Arms