400e Polymer Barrel Kit

Upgrade the internal barrel of your 400e Gen 2 Polymer rifle with this complete barrel kit, available in your choice of Standard or Precision barrel type. This kit is specifically designed for compatibility with the 400e Gen 2 Polymer, which uses a 357mm barrel length. The 400e Polymer first launched in October 2024 as part of the Gen 2 release. If you purchased your 400e Polymer between October 2024 and June 2025, your rifle came stock with a Precision barrel. If you purchased it in July 2025 or later, your rifle came with a Standard barrel. This is important to know when selecting the right kit for your goals. The Standard Barrel Kit offers reliable performance and allows for greater flexibility with BB types. It's less sensitive to slight imperfections in BB shape or finish, making it a great option for casual target shooting and higher-volume use with a broader range of steel BBs. The Precision Barrel Kit is built to tighter tolerances and delivers improved accuracy and consist