Ok...So as soon as I Dig up the 300 BLK SBR thread this one pops up 
What kind of groups are yall getting from your 300 BLK SBR's? Supersonic or Subsonic? Im trying to figure out which way I need to head... as Im about to jump into another 300 BLK build.

What kind of groups are yall getting from your 300 BLK SBR's? Supersonic or Subsonic? Im trying to figure out which way I need to head... as Im about to jump into another 300 BLK build.
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