Processor trigger unit for Arcturus V2

Perun for Arcturus V2 is a dedicated electronic trigger unit for selected Arcturus Version 2 gearbox variants. It replaces wear-prone electrical contacts with optical sector-gear and selector-position sensing together with magnetic trigger sensing, providing reliable cycle, selector, and trigger detection.

The unit includes an integrated Clicker that adds a tactile trigger wall and break without requiring a separate accessory. Selector calibration compensates for small differences in selector-system geometry and reflectivity, while the full feature set familiar from Perun’s latest electronic trigger units provides extensive control over firing behavior.

Programming

All settings are configured using quick, easy-to-remember sequences of selector movements and trigger pulls, guided by sound signals and a multicolor LED. No tools or apps are required. Settings for SEMI and AUTO are independent and can be changed in seconds, even in the field.

• Brushless motor support
• Binary trigger
• DMR mode
• Rate of fire reduction

Compatible with both traditional brushed and brushless (BLDC) motors. When using a brushless motor, follow the motor manufacturer’s recommendations concerning active brake and PWM-based rate-of-fire reduction.

Features

• Adjustable trigger sensitivity: Trigger sensitivity can be adjusted electronically at any time, including in the field, to suit the user’s preferences and playing style. No permanent trigger modification is required.
• Independently programmable firing modes: Program each selector position (SEMI and AUTO) independently as SAFE, semi-automatic, burst, automatic, or binary. For example, SEMI can remain semi-automatic while AUTO is configured as binary.
• Active brake: Active brake stops the motor after each shot, prevents the spring from remaining compressed, and eliminates overspin—the double-shot problem found in some high-ROF replicas. Braking strength is adjustable, and active brake can also be disabled completely. Active brake and pre-cocking settings are independent.
• Pre-cocking: With pre-cocking enabled, the piston remains in the rear position after each shot with the spring already compressed, so the next shot is fired as soon as the trigger is pulled. Pre-cocking strength is adjustable and automatically adapts to battery voltage. To release the spring safely, select SEMI, fire one shot, and keep the trigger held; after 3 seconds, a second shot is fired with maximum active brake, leaving the spring uncompressed.
• 2-stage trigger: A light trigger pull fires in one mode, while a deeper pull activates another. Available combinations are semi-automatic–burst, semi-automatic–automatic, and burst–automatic.

Safety

• Low battery voltage alarm: Repeated sound signals warn when battery voltage falls to a level at which the battery should no longer be used. The unit automatically detects the number of cells and sets the threshold accordingly. The function can be disabled for batteries other than Li-Po or Li-Ion.
• Diagnostic system: Continuously monitors the replica and the unit itself. If a problem occurs—such as a gearbox jam, overheating, short circuit, or sensor fault—the LED identifies the specific issue, making troubleshooting fast and straightforward.
• Electronic resettable fuse: Automatically cuts power in the event of a short circuit or gearbox jam, protecting both the replica and the battery. It resets after the battery is reconnected and the fault is removed, so no fuse element needs to be replaced.