400e Polymer Barrel Kit velocity_340_fps and valves of your airsoft

and valves of your airsoft or airgun

this high-capacity magazine holds up to 300 rounds of 6mm airsoft BBs

Pump at a slow and steady pace—this prevents overheating

and four No-cost screws

With its interchangeable barrel system

400e Polymer Barrel Kit velocity_340_fps and valves of your airsoftUpgrade 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