Barra 400E Polymer Ver. Precision Barrel Kit Airsoft ETU All Unicorn inner barrels will

All Unicorn inner barrels will NOT include hop-up bucking

A generously padded back and spacer mesh ensures a comfortable fit during long treks or patrols

Modular design allows left and right usage

All moving parts must be kept well lubricated to avoid heat built up and excessive wear as well as securing a tight seal between cylinder and piston head O-ring

Barra 400E Polymer Ver. Precision Barrel Kit Airsoft ETU All Unicorn inner barrels willUpgrade 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