Yes. There is a commercial version available as well. Not a general issue pistol for the marines, but it is replacing some pretty well worn, old and several times overhauled 1911s that they keep in stock.
This one has a Colt frame and Springfield slide that was purchased back in the '80s or '90s as part of an overhaul program for MEU/SOC. The wear lets you know it's been knocking around for a while.
At that time they also upgraded to King's sights, Beavertail, and ambi safety. Then a Colt Commander hammer along with upgraded trigger.