ZeroTech Thrive TH3940 3-9x40mm Rifle Scope 30mm Tube Zeroplex

The ZeroTech Thrive TH3940 delivers precision optics performance with its 3-9x magnification range and 40mm objective lens in a robust 30mm tube design. This rifle scope combines clear glass with reliable tracking to meet demanding shooting applications. The Zeroplex reticle provides clean target acquisition across varied lighting conditions.

What Makes This Different

The Thrive series incorporates fully multi-coated lenses that maximize light transmission compared to basic coated optics. The 30mm main tube provides 25% more internal adjustment range than standard 1-inch tubes, allowing precise zero retention across extended shooting sessions. ZeroTech's manufacturing process includes nitrogen purging and O-ring sealing for consistent performance in temperature extremes from -20°F to 140°F.

Key Features

• 3-9x variable magnification with 40mm objective lens for versatile range applications
• 30mm aircraft-grade aluminum tube construction with matte black anodized finish
• Zeroplex reticle design optimized for target acquisition and holdover estimation
• Fully multi-coated lens system delivering 95% light transmission
• Capped turrets with 1/4 MOA click adjustments for precise zeroing
• Fast-focus eyepiece accommodates prescription glasses and varying eye relief
• Nitrogen-purged and O-ring sealed construction prevents fogging and moisture intrusion

Field testing demonstrates consistent tracking performance across the full adjustment range, maintaining zero through recoil cycles typical of centerfire rifle cartridges. The scope handles temperature variations encountered in hunting seasons and competitive shooting environments. Eye relief measures 3.5 inches at maximum magnification, providing comfortable shooting positions for bolt-action and semi-automatic platforms.

Technical Specs

• Magnification: 3-9x variable power
• Objective Lens: 40mm diameter
• Tube Diameter: 30mm
• Overall Length: 12.2 inches
• Weight: 16.8 ounces
• Eye Relief: 3.5 inches
• Field of View: 33-11 feet at 100 yards
• Reticle: Zeroplex (Second Focal Plane)
• Turret Adjustment: 1/4 MOA clicks
• Finish: Matte black anodized aluminum
• Waterproof Rating: IPX7

The TH3940 represents solid value in the variable power scope category, combining essential features with dependable construction. ZeroTech's quality control standards ensure consistent performance across production runs, making this scope a practical choice for shooters requiring reliable magnification without premium pricing.