There was a period of time when the Colt SMGs were SPECIFICALLY identified as training use only; but that changed recently after the MP5s got turned in. Funniest part of that is big Navy doesn't support the Colt's EITHER, so I have NO idea why we kept those instead of the MP5s.
I think we're headed towards a situation where we'll turn the Colts in as well, and just issue M4s to everyone who needs a long gun.