+1 vote... though i would go with a 16" or 18" bbl with a mid-length gas tube, shorter bbls loose efficiency with intermediate burn rate powders....
+1 vote... though i would go with a 16" or 18" bbl with a mid-length gas tube, shorter bbls loose efficiency with intermediate burn rate powders....6.8 upper, 14.7" bbl with PA Flash Hider.