The Perun ETU for VFC G28 / HK417 is a complete trigger and electronics upgrade that replaces your stock trigger unit with a fully adjustable, high-performance system.

It combines optical sensors, magnetic trigger detection, and a built-in adjustable clicker trigger, giving you faster response, better reliability, and a realistic trigger feel—all in one drop-in unit.

Designed specifically for VFC G28 and HK417 replicas, this is the upgrade that turns your rifle into a true DMR or high-performance battle rifle.

What It Does (Simple Breakdown)

• Faster trigger response – instant shot reaction
• Adjustable clicker trigger – tune pre-travel, overtravel, and break feel
• Custom fire modes – semi, burst, auto, or binary
• Precocking – near-instant follow-up shots
• Active brake – prevents overspin and double shots
• Rate of fire control – dial in your build
• DMR mode – enforces semi-auto with shot delay

What Makes It Different

• Built-in Clicker Trigger (No Add-ons Needed)
  Unlike most ETUs, this already includes a fully adjustable clicker for a realistic trigger break.
• No Mechanical Contacts
  Uses optical and magnetic sensors for maximum reliability and consistency.
• True Drop-In for VFC Platforms
  Designed specifically for G28 / HK417—no guesswork or heavy modification.
• Field Programmable
  Change settings anytime using just your selector and trigger—no apps required.

Key Features Made Simple

• Adjustable Clicker Trigger
  Set exactly how your trigger feels—light and fast, or a strong, realistic break.
• Trigger Sensitivity Control
  Choose from multiple sensitivity levels without modifying your trigger.
• Binary Trigger Option
  Fire on pull and release for rapid follow-up shots.
• Independent Selector Programming
  Set each selector position however you want (example: semi + burst).
• Diagnostic System
  Instantly tells you what’s wrong if something goes down.

Compatibility

• Designed for:
  • VFC G28
  • VFC HK417
• Works with:
  • 7V–17V batteries
  • High-power and DMR builds
  • DSG setups

Perfect For

• DMR players wanting realistic trigger feel
• High-performance builds needing reliability + control
• Players upgrading from stock VFC trigger systems
• Anyone who wants both realism AND performance