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Posted: 3/6/2006 6:26:59 PM EDT
Just bought a new Rock River Arms Lower Receiver and guess what.........My carbon pistol upper fits the lower!

Now I know the bolt Carrier Group on the Carbon 15 pistol is different. I could swear that someone told me that the Carbon 15 lowers would not fit a standard AR15 upper. If my carbon upper fits the standard lower, I would assume vice versa!

anyone ever tried this???
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