Largest GTLS tritium vial: Delivers maximum brightness and visibility in low light or pitch dark conditions
Silent, heat-free operation: Ensures covert and safe use in sensitive environments
No batteries, bulbs, or switches: Requires zero user input and eliminates maintenance needs
Impact-resistant clear polycarbonate body: Withstands harsh outdoor and tactical conditions
Multiple color options: Allows for customizable visibility and identification
Summarized by Shop
The Firefly MegaGlow Marker delivers powerful, long-lasting glow using the brightest tritium light source available. Designed for professionals and enthusiasts alike, it's perfect for marking gear, routes, or danger zones in low-light or pitch-dark environments—without electricity, heat, or batteries.
Powered by the largest size GTLS (Gas
Length
41.0 mm
Diameter
10.5 mm
Split ring diameter
18.0 mm
Weight
8 g
Body material
Clear V0 rated polycarbonate
Caps
Polished stainless steel
Summarized by Shop
4.5
4 ratings
5
4
3
2
1
Brightness of luminophor or amount of tritium gas is questionable.
Tracking and delivery went very well