Originally Posted By Landric:
The new Colt 9mm carbines (which includes the recent 6450 with the carry handle) have ramped bolts and stainless fire control pins. Basically, they are set up to be 9mms now and shouldn't have the problems with egged pin holes or broken bolt stops. They also include a 9mm heavy buffer and buffer spacer.
My recent 6450 came with Colt marked Metalform magazines dated 6/98. They work perfectly, but C-products mags also work perfectly. I prefer Metalform because they are of higher build quality and my CMMG dedicated 9mm lower doesn't do well with the C-products mags. I'd stick with Metalform, though if your Colt is like mine, C-products mags might work just fine.
Thanks for the info. Looking forward to shooting this thing. Have an Aimpoint Micro waiting to be mounted. Not sure if I'm going to keep the Rogers stock or throw on an M4 stock. Any suggestions on where to get Colt spare parts?