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AR15.COM
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4/10/2011 6:56:29 AM EDT
Am I right the only two parts that are caliber specific is the upper and the barrel? Want some suggestions on both of these I am going to build a 6.8mm.
4/10/2011 7:02:32 AM EDT
[#1]
Barrel & bolt.
4/10/2011 7:20:28 AM EDT
[#2]
Magazine too. Also M4 feed ramps become more important in a semi-auto.
4/10/2011 7:38:22 AM EDT
[#3]
Flash hider also.
4/10/2011 7:44:29 AM EDT
[#4]
Then the page count to me is UPPER Receiver (M4 feedramp or file/grind it yourself), M4 Barrel Extension, Barrel (FSB or gas block and flash hider), Bolt, and Magazine - Mission Complete.  While it is stated in many, many posts that the M4 feedramps are not required...It seems to help the feed jam problems of the 6.8mm.

Rob
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