Here's the Marine Corps Times article.
Awhile back the USMC changed the T/O weapons assignments so that the only Marines carrying pistols in most units will be Colonels and above, as well as sailors above the rank of E-5. More junior officers and SNCOs who used to get a sidearm get an M4 carbine. The few Marines carrying pistols under the new T/O will continue to use the M9, I gather.
This Colt built 1911 with a frame rail is going to be used by special operators and Force Recon Marines.
I always thought that it was a shame when they took away our 1911A1s and gave us the Beretta. I never had a problem qualifying expert with the .45, and I confess to feeling better armed with the bigger round.
It's been awhile since my time with the USMC. When I started there where still a few tangible links to WWII...steel helmets, .45 caliber pistols and C-rations. Now about the only thing from those days still in use is the .50 caliber machine gun.
For no logical reason that I can point to, it does my heart good knowing that some Marines will continue to carry the M1911 into battle for some time to come.