Colt SP901
Colt is working on releasing this new rifle come December 2011. The release dates for this weapon has been changed a few times (April 2011 and August 2011) so we will see if they have it out by Christmas time so Santa can put it in your stocking if you have been a good little shooter this year.
The .308/ 7.62NATO magazine is a P-Mag (SR-25 style magazines).