Small, robust LED mod built to drop into the popular MAX hopup housing. Twin 3W UV diodes (395–400 nm) on a custom PCB.
Why you want it
Real UV illumination so tracer rounds glow properly through the MAX hopup.
Compact PCB fits beside the upper; wires can be routed beside the gearbox into the stock for easy battery installation
Top-mounted easy-switch for on/off access without tearing the gun down.
Only use 4V if you’re running it in short bursts (triggered use). Do not run it continuously at 4V. For safer continuous use, run 3.3V-3,7V (the LEDs will draw roughly ~50–100mA).
3.3V ~50 mA 3,7V ~100mA
Warranty / liability: There is no warranty on this part—it's priced cheaper to reflect that. Use at your own risk.
Version note — Batch 1 (V1.0B1)
Dimensional issue: (V1.0B1) measured slightly off — only two mounting screws can be used (either the top pair or the bottom pair). It works fine in the field, but plan your install accordingly.
Fit & behavior tips
The first BB out of the chamber will appear dark — it sits behind the hop-up and isn’t hit by the UV until it advances. Not a fault, just physics.
Route wires tight along the gearbox and down into the stock.
If you want trigger-controlled illumination, use the EN pin and wire to a momentary switch or trigger microswitch (Please note, this is not recommended for batch one, since it will alter the PCB, we had to jumpwire the EN Bridge, so you will have to desolder this wire)
