Wondering if anyone else has had issues with their barrels being out of spec. I SBR'd my Coharie years ago. The flash suppressor I bought didn't slip on easily so I didn't force it due to not really liking the look of it if it was in place. I now have a Rugged Obsidian sitting in jail and while preparing for its purchase, attempted to attach the 3 lug adaptor. It wouldn't go on either. Haven't mic'd the barrel yet as I'm not sure if specs. S# ahc040'ish is lower production, if I'm not mistaken. Need options here cause the Obsidian was purchased mainly for this SBR.