Firefield Waterproof Tactical 4-16x42mm AO IR Rifle Scope

The 4-16x42 AO Tactical IR Riflescope from Firefield is a nitrogen-filled zoom optic designed for mid-range targets. Complementing this scope's 16x maximum zoom and 1:4 zoom ratio is adjustable objective (AO) parallax correction, which can be set from 15 yd to infinity by rotating the ring on the objective bell. This scope features a Mil Dot reticle that can be illuminated in red or green using a dedicated reticle brightness side turret. The reticle illumination control has five selectable brightness settings for each color; green illumination is more visible than red in low-light conditions, but red is more useful for targeting subjects among a woodland landscape. In addition to the broad zoom range and illuminated reticle, the Tactical riflescope has a multicoated optical path, shock-resistant housing, and 1/4 MOA locking turrets, equipping this optic for reliable mid-range performance outdoors.

Optical Performance

  • 4-16x magnification, 42mm objective
  • 1" main tube diameter
  • Multicoated optics
  • 26.2-7 ft field of view at 100 yd
  • 15 yd to infinity parallax correction
  • Second plane Mil Dot reticle, red or green illuminated

Use and Handling

  • 1/4 MOA impact point correction
  • Locking windage and elevation turrets
  • Parallax adjustment objective ring
  • Grooved eyepiece focus ring
  • 1" mounting rings included
  • Uses (1) CR2032 battery
  • 5-level reticle brightness adjustment

Construction Details

  • Nitrogen-filled fogproof and waterproof housing
  • Shockproof up to 1200g recoil force
  • -4 to 140° operating temperature
  • 13.4" length, 26.5 oz weight


Notice for California consumers:
⚠ WARNING: Cancer and Reproductive Harm –