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This is my first post. I have a bare lower laying around that is destined to become a 6.8 SPC.

However, I want too make sure I am building a quality, but affordable 6.8 (Sorry, my last build totally nearly 2K and I cannot do that again for a while :mrgreen: ). The purpose of this one will before basic target shooting and maybe my Go-to AR if need be.

I am looking at The Rock River Mid-length upper. However, it does not appear they offer a chrome lined one as of yet.

The area where I am uneducated is twist. I have heard that 1:10 twist is not a good one, but that seems to be what many barrels come in. Why does everyone use this twist if it cannot handle certain loads? How much does it matter?
 

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I'm a newbie also but I think I can help you on your way! Read this thread for your upper -> http://68forums.com/viewtopic.php?f=1&t=3737. The 1 in 10 twist is the default from the original specification. That specification had a number of faults due to some sloppy work on the part of the originating company. For some real world references to the differences based on changing the twist and chamber take a look at the down load from the first post in this thread -> http://68forums.com/viewtopic.php?f=1&t=3473. Welcome aboard! :mrgreen:
 

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Glad you're here Jason. You'll like the RRA upper, many happy RRA owners are on this site.
 
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