The Marble Arms 5X40 Sight is a magnified rifle sight built for shooters who need a reliable, accurate sight picture across varying light conditions. This CNC-machined steel sight combines fast-acquiring tritium elements for low-light performance with a protected white ring that works equally well in daylight hunting and range scenarios. Whether you're working with a vintage rifle, a custom build, or a firearm that pairs well with iron sights, the 5X40 delivers the magnification and durability you expect from a maker with Marble Arms' reputation in precision shooting.
The white ring is recessed into the sight body—a thoughtful design choice that shields it from scratches during handling and transport, while the recessed geometry ensures consistent light reflection regardless of your shooting angle. This means you're not fighting glint or looking for the sight picture; it finds you. The tritium element takes over in conditions where daylight sights lose their edge, giving you a glowing aiming point without batteries or external power.
Built to rigid tolerances and finished in durable steel, this sight integrates into rifles and firearms that accept Marble Arms sight systems. It's the kind of optic that rewards you for knowing your rifle and trusting your fundamentals—no complicated adjustments, no unnecessary features, just a proven sight that gets the job done from the bench to the field.
Key Features
- 5X magnification for precise aiming and target acquisition
- 40mm objective for efficient light gathering
- Tritium element provides fast, reliable sight picture in low-light conditions
- Recessed white ring design protects against scratches and ensures uniform light reflection
- CNC-machined steel construction for durability and precision
- Compatible with Marble Arms mounting systems
Specifications
| Magnification | 5X |
| Objective Diameter | 40mm |
| Material | Steel |
| Sight Type | Magnified rifle sight with tritium and white ring |
| Illumination | Tritium (low-light) and recessed white ring (daylight) |
Frequently Asked Questions
What firearms accept the Marble Arms 5X40 Sight?
This sight is designed for rifles and firearms that use Marble Arms sight mounting systems. Check your rifle's sight base compatibility before purchasing.
Does the tritium require batteries?
No. Tritium is self-illuminating and requires no external power source or batteries. It provides a glow that is visible in low light and darkness without any user input.
Can the white ring be damaged or scratched?
The white ring is recessed into the sight body specifically to protect it from impact and scratches during normal handling and use. This design also maintains proper light reflection from various shooting angles.
Is this sight suitable for hunting?
Yes. The combination of magnification, tritium low-light capability, and the white ring for daylight aiming makes the 5X40 practical for hunting scenarios where lighting conditions vary.

