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Archived [ARCHIVED THREAD] - Rock River 9MM upper on .223 lower??
Posted: 9/4/2003 3:18:53 PM EDT
Can you put a Rock River 9MM upper on a Rock River .223 lower? I hear that there are different hammers and buffer springs to consider when doing the swap. I would like to be able to swap back and forth. Any help would be great....

Link Posted: 9/4/2003 5:09:02 PM EDT
[#1]
This has been hashed over and over, read the following thread>>>>> [url]http://www.ar15.com/forums/topic.html?b=3&f=15&t=108261[/url], it covers most of the 9mm "COLT" pattern issues-- it is the 1st page that really explains it all, and has good pics.

Archived [ARCHIVED THREAD] - Rock River 9MM upper on .223 lower??
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