The Glock Blue Label thread & Jimmy's prices got me looking more closely at the G19 Gen 5. I've seen two distinct versions of this pistol in online pics...one with front cocking serrations & one without. Question - Are both versions being sold concurrently or is one an "old" version? The Jimmy's Blue Label stock is the front serration variety. Is the answer that the Blue Label type has front serrations and "regular" ones don't? TIA for any clarification.