INSERT SIZING { "__shgImageV2Elements": { "uuid": "s-d83d671e-8e6d-4996-8d26-fc7a68f70d7e" } } Select bore size based on paint dimensions, desired air efficiency and weather conditions. Diameter .679 .681 .683 .685 .687 .689 .691 Length 8.5" { "__shgImageElements": { "uuid": "s-332792a9-0504-4c06-b675-7a0d4e1cae7d" } } DESCRIPTION The CRBN Inserts build on the proven PWR™ System. Available in 7 optimized bore sizes and finished in an ultra gloss black anodized with lasered labeling. Each 8.5" insert is precision broached and microhoned to deliver the utmost accuracy. PWR™ Insert’s chamfered breech opening and stabilized collar all but eliminates untimely ball breaks in the barrel. Simply the best barrel system available. PWR™ trademark is owned by Planet Eclipse Ltd. FEATURES + Ultra lightweight ~ 0.9 oz + 7 bore sizes available (.679 .681 .683 .685 .687 .689 .691) + Aluminum composition + Chamfered breech-end + Perfect bore to barrel tip alignment + Chamfered breech-end + 8.5" control bore + Precision Broached to size + Polished anodizing with lasered graphic labels PRODUCT CARE !WARNING! Always use an approved barrel cover (BBD) and chronograph before play