US Optics B-17 3.2-17x50

• 3.2-17x magnification range: This zoom span covers close-to-mid distance target acquisition and extends into deliberate long-range work, so one riflescope can move between practical field shooting and precision engagements without feeling specialized to only one task.
• First focal plane illuminated reticle: Because the reticle stays proportional through the zoom range, holdovers and ranging references remain consistent at any magnification, while illumination improves reticle visibility against dark targets or shaded backgrounds.
• Lockable tactical turrets with zero stop: The locking design helps prevent accidental movement during transport or positional shooting, and the zero-stop system gives a fast, repeatable return to the established zero after dialing elevation.
• Side parallax adjustment from 45 m to infinity: Fine parallax control helps keep the target and reticle on the same focal plane, which supports more precise shot placement as distances increase and shooting positions become less stable.
• 34 mm tube and 25.11 mrad adjustment range: The larger tube and generous internal travel provide useful dialing range for extended-distance shooting while preserving the robust feel expected from a tactical riflescope.

About the US Optics B Series

The US Optics B Series was built around the magnification ranges professional shooters commonly look for, with the family consisting of the B-10, B-17, and B-25 models. Across the line, the design emphasis is on practical dialing, repeatable zero management, and controls that stay secure under hard use rather than on unnecessary complexity. A defining part of the series is its locking elevation and windage knob system, paired with the EK2 stop, a revolution counter, and tool-free elevation zeroing, all of which support fast corrections and a dependable return to zero.

The series also integrates single-button reticle illumination into the parallax knob, keeping the control layout compact and intuitive. Depending on configuration, B-Series scopes were offered with 1/10 mil or 1/4 IPHY adjustments, which made the line suitable for shooters who wanted a familiar correction system for tactical, competition, or crossover field use. In the U.S. Optics lineup, the B Series sat as a purpose-driven tactical riflescope family that combined broad zoom ranges, first focal plane functionality, and robust mechanical features in a format meant for serious dialing and holdover work.

About the US Optics B-17 3.2-17x50

The US Optics B-17 3.2-17x50 is the most versatile middle-ground model in the B Series, balancing a useful low end for faster target acquisition with enough top-end magnification for precise shot placement at distance. Its 3.2-17x magnification range makes it well suited to rifles that may be used across changing terrain, where a shooter might need to transition from closer observation to careful elevation dialing without changing optics. The 50 mm objective supports a bright, usable sight picture while keeping the scope in a size class that still works well on practical precision and tactical rifle setups.

The first focal plane reticle is a key advantage on a scope like this because subtensions remain correct throughout the zoom range. That matters when holding for wind, using reticle references quickly, or working at intermediate magnifications instead of always staying at maximum power. Daytime-visible illumination adds contrast when the reticle would otherwise blend into dark targets or cluttered backgrounds, and the automatic shutoff helps preserve battery life during real field use.

Mechanically, the B-17 is configured for shooters who dial with intent. Its lockable tactical turrets, double-turn layout, and zero stop support repeatable elevation changes while reducing the chance of unintended turret movement. Side focus adjustment from 45 m to infinity helps refine the image and reduce aiming error at varying distances. With a 34 mm tube, fully multicoated lenses, nitrogen filling, and waterproof, fogproof, and shockproof construction, this riflescope is built for regular use in demanding hunting optics and tactical optics roles.

About US Optics

U.S. Optics was founded in 1991 in Buena Park, California, and established its name in riflescopes for demanding precision, competition, and defense-oriented shooting. The company is a U.S. manufacturer of riflescopes and other shooting optics, and its products serve the competitive, hunting, and defense-shooting communities. U.S. Optics also helped pioneer low-power variable optics, and the SN-3 became one of its notable riflescope lines.

In later years, the company expanded its commercial off-the-shelf offerings with scope families such as the SR, ST, MR, LR, and ER lines. After acquisition by DRSG, U.S. Optics moved to Kalispell, Montana, in 2017, then joined ZRO Delta and moved to North Carolina in 2019, where its engineering team is located in Connelly Springs. This background helps explain the brand’s focus on mechanically capable riflescopes designed around practical shooting requirements rather than purely catalog specifications.

Main Features

• Magnification: 3.20 x - 17.00 x
• Objective lens diameter: 50.00 mm
• Main tube diameter: 34 mm
• Reticle position: 1. focal plane - FFP
• Reticle illumination: Yes
• Daytime illumination: Yes
• Automatic turn off: Yes
• Turret type: Tactical - Lockable
• Zero-Stop: Yes
• Turret turns: DT - Double Turn
• Elevation adjustment: 25.11 mrad / 86.00 MOA
• Windage adjustment: 25.11 mrad / 86.00 MOA
• Parallax adjustment: Yes - side focus
• Parallax adjustment range: 45 m to infinity
• Eye relief: 89.00 mm - 90.00 mm
• Field of view: 2.60 m/100m - 8.40 m/100m
• Exit pupil: 3.00 mm - 15.20 mm
• Diopter adjustment: -3/+2
• Fast focus eyepiece: Yes
• Lens coatings: Fully Multicoated
• Length: 382.00 mm
• Weight: 887.00 g
• Filled with: Nitrogen
• Water proof: Yes
• Fogproof: Yes
• Shock proof: Yes

Warranty

US Optics provides a 10-year warranty for this riflescope. This stated warranty period gives defined long-term coverage for normal ownership and regular field use.