Eclipse S63 Pro Barrel Kit 14 Inch with PWR .689 Insert SilverThe Planet Eclipse S63 Pro Barrel kit is the most advanced barrel system to date. Introducing the Eclipse PWR Inserts and 3 piece construction, the S63 Pro offers exceptional shot consistency and accuracy and combines it with aggressive styling, reduced sound signature, and class leading flexibility and options. S63 Pro Barrel. Exceptional shot consistency. More control. More precision. More options. Customize your barrel system the way you want. The