This is a drop-in kit that is pre-assembled, so it is super easy to fit. Literally, all you need to do is place it inside your WE/TM/KJ branded Hi-Capa to instantly improve your pistol's consistency and range.

The barrel has a tight bore inner diameter of 6.01mm, which will improve consistency and longer range when coupled with a high-quality BB.

Features:

• Made to work perfectly together
• 60° Autobot bucking
• 6.01mm inner barrel
• Pre-assembled drop-in kit
• Easy way to upgrade
• May increase output power
• Much more reliable than OEM part
• For WE / Tokyo Marui & KJ Works

Package Includes:

• Hop-Up & Inner Barrel Set for Hi-Capa