I know that Cheaper Than Dirt often has the .223 mil-spec, M200, crimped version in stock; bought some there once. I know that they sell both the yellow and red muzzle-mount blank adapters, too, for about 10 bucks. (Which are almost 100% necessary in order for the carbine to cycle properly: not enough gas back-pressure otherwise, though you could still do single-shot, manual-charge demo/practice without the adapter...may even cycle one round without the adapter, if you're lucky.)jimlongley wrote:Can you tell me where you got those blanks?
Ammoman (http://www.ammoman.com/) often has M200, as well. Prvi Partizan used to make them, but I think they discontinued doing so, so there may be some good deals floating around on older lots if you can find them.
One note is that you don't want the original M200 rounds that had a white tipping on the crimp. The newer stuff (a violet-colored crimp if from Lake City) is dirty enough (read: twice as dirty as poppin' regular ammo), but the white-tipped, older cartridges can have your action dirty enough to foul after just a few magazines.