US OPTICS 5-25X58mm ER-25 FFP Riflescope


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Weight40oz / 1.13kg
Objective Lens Diameter 58mm
Field of View@ 5x: 16.6’ @ 100 yards / @ 25x: 5.3’ @ 100 yards
Eye Relief3.5” / 8.9cm
Scope Tube Diameter1.34” / 34mm
Scope Magnification5-25x
Power VariabilityVariable
Maximum Power25X
Minimum Power5X
Length•Tube Length: 6.6” / 168mm •Overall Length: 18” / 45.7cm
ReticleMIL Scale GAP / H59
Illuminated ReticleYes
Illumination SettingReticle Illumination: Red
Exit Pupil2.7mm
Parallax Adjustment25yds to ∞
BatteryLithium Coin, CR2032
Focal PlaneFirst Focal Plane
Diopter compensation+2 to -3
Ocular Lens Diameter1.26” / 32mm
Battery RuntimeUp to 8,000 Hours
Finish ColorBlack
Objective Lens Housing Diameter 2.65” / 66mm
WarrantyU.S. Optics Electronics 2 Year Warranty

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Extreme Range (ER Series) Optics


 No Impossible Shot

Have you heard of the impossible shot? Not if you have an ER-25 mounted to your shooting stick. With the right caliber and rifle, shots beyond 2,000 yards become a reality with the ER-25 series scopes. A 58mm objective lens sits in front of a Turret Parallax Adjustment Locator (TPAL) system guaranteeing the sharpest image resolution possible throughout the 5-25X power magnification range and at distances past 2,000 yards. Target acquisition for accurate shots beyond 2,000 yards is possible when dialing the power ring of an ER-25 to maximum power.

When weather and light conditions are less than optimal, the 12-position illuminated reticle system provides yet another advantage for taking your best possible shot. All ER‑25 optics feature an Erector Repositioning Elevation Knob (EREK) system that maximizes gross elevation travel adjustment for maximum elevation adjustment where traditional turrets leave off beyond 2,000 yards. MIL, MOA and Horus reticle options are available in the ER-25 product line.

ER-25MIL Specifications

  • Elevation Knob: 1/10 MIL EREK
  • Total Elevation Travel: 26.5+
  • Windage Knob: US#3, 1/10 MIL
  • Windage Adjustment Range: 8L / 8R
  • Reticle: MIL Scale GAP, First Focal Plane

ER-25MOA Specifications

  • Elevation Knob: ¼ IPHY EREK
  • Total Elevation Travel: 95+ IPHY
  • Windage Knob: US#3, ¼ IPHY
  • Windage Adjustment Range: 28L / 28R
  • Reticle: MDMOA, First Focal Plane


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US OPTICS 5-25X58mm ER-25 FFP Riflescope

US OPTICS 5-25X58mm ER-25 FFP Riflescope