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Old November 27, 2010, 03:06 PM   #8
Senior Member
Join Date: March 1, 2010
Posts: 100
Thanks all!

The stripped Carbon-15 Upper assembled exactly like a standard aluminum Upper (only no forward assist or ejection port cover). I used a regular Bushmaster Superlight Barrel (chrome lined 1-in-7" twist) and a standard barrel nut.

The only odd thing about it is that the barrel extension sticks out on the inside of the receiver (ie the inside of the plastic receiver is not flush with the receiver extension). This has not caused any problems, however, and I have never had a failure to feed.
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