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Posted: 9/17/2004 10:37:09 AM EDT
I know that this should probably be posted in the AR15 forum, but my buddy tried the question there and didn't have much luck. I have an opportunity to buy a few SP1 uppers in excellent condition at a great price. My only concern is matching them to a lower. I have never built an AR15 from Colt parts, but I know that there is a difference in the size of the holes. Could someone please let me know what I will need to do to build this SP1 with a Rock River or Bushmaster lower. Thanks in advance for the help.
Link Posted: 9/17/2004 10:41:26 AM EDT
Try the "Build It Yourself" forum...sorry
Link Posted: 9/17/2004 10:46:03 AM EDT
The only piece you will need is this:

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