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The Tstorm FFP Japanese ED Glass Rifle Scope 1-10x28 is a precision optical tool built for shooters who demand versatility and accuracy—whether for competitive shooting, hunting, or tactical training. At its core, premium Japanese ED Glass eliminates chromatic aberration, delivering sharp, color-true images, while the First Focal Plane (FFP) Reticle ensures consistent subtension accuracy across its 1-10x variable magnification range. Weighing just 698g, it balances portability with ruggedness, backed by IP67 waterproof/dustproof protection and an operating temperature range of -30℃~50℃, making it reliable in harsh outdoor conditions. Designed for AR platforms and long-range engagement, this scope bridges the gap between close-quarters speed and extended-distance precision.
Initial Set Up
• Reticle Focal Plane (Second Focal Plane vs First Focal Plane)
All riflescope reticles can be termed either first focal plane (FFP)or second focal plane(SFP), with respect to the reticle's internal location within the erector system. An SFP reticle is visually consistent in size and weight across the magnification range; however the subtension values are only accurate on one magnification, typically the highest.In contrast,an FFP reticle will scale with magnification, and their subtensions used for ranging, holdovers, and wind corrections will remain constant. The reticle size will appear larger at higher magnifications, and smaller at low magnification.
• First Focal Plane Reticle
These Cuinifi® 1-10x28 Riflescopes feature a FFP reticle. FFP reticles are located within the riflescope near the windage and elevation turrets. This style of reticle will appear to grow and shrink as you change the magnification.
• Parallax Adjustment
The Cuinifi® 1-10x28 riflescope is non-adjustable for parallax correction and is set from the factory to be parallax-free at 100 yards (90 meters). When shooting at distances other than 100 yards, using good consistent shooting form and cheek weld will prevent most problems with parallax.
• Ocular Focus – Fast Focus Eyepiece
The ocular focus is typically a one-time adjustment used to focus the reticle for maximum sharpness. This adjustment is slightly different for every shooter. A clearly focused reticle is a critical component for accurate shooting. When setting up a riflescope, this should be the first adjustment you make and should only need to be changed from user to user, or if your eyesight changes over time.
• Ocular Focus – Fast Focus Eyepiece Adjustment
The Cuinifi® 1-10x28 riflescope uses a Fast-Focus Eyepiece designed to easily adjust the focus on the riflescope’s reticle.
WARNING: Looking directly at the sun through a riflescope, or any optical instrument, can cause severe and permanent damage to your eyesight.
• Adjusting the Reticle Focus to your Eye
1. Turn the Magnification Adjustment Ring to the highest power. Looking through the optic, turn the Fast-Focus Eyepiece counterclockwise until the reticle is slightly blurry.
2. While looking at a white wall or a clear blue sky, taking short glances through the optic, turn the Fast-Focus Eyepiece clockwise until the reticle is clear and crisp as soon as you look through the optic. This may take several attempts.
Note:You do not want your eye to focus to the reticle, rather you want the reticle in focus to your eye instantly when looking through the optic. Looking away and letting your eyes refocus is important in getting the Fast-Focus Eyepiece set correctly.
Once this adjustment is complete, it will not be necessary to refocus every time you use the riflescope. However, because your eyesight may change over time, you should recheck this adjustment periodically.
• Magnification Adjustment
The Magnification Adjustment Ring is used to change the riflescope’s “power.” The Cuinifi® 1-10x28 riflescopes are variable powered optics with a 1× optical design. To adjust your optic’s magnification, rotate the Magnification Adjustment Ring clockwise, or counterclockwise, to increase or decrease the magnification to your desired level.
TURRETS
The Cuinifi® 1-10x28 riflescope is offered in Milliradian (MIL).
Note: The top of both the windage and elevation turret will state what unit the riflescope is laid out in.
• Milliradian (MIL) Adjustment
MIL, which is short for Milliradian and another unit of angular measurement, is defined as 1/1000th of a radian (6.2832 radians in a circle) and 1 MIL equals to 3.438 MOA and 3.6 inches at 100 yards, 7.2 inches at 200 yards, and to 36 inches at 1000 yards. 1/10 MIL per click takes 10 clicks to move point of impact 3.6 inches at 100 yards. Knowing the click value and the number of clicks needed for different distance is critical to dial in elevation and windage adjustments based on the rifle ballistics and wind velocity.
• Elevation and Windage Turrets
Use turrets to adjust the bullet’s point of impact. The Cuinifi® 1-10x28 riflescope uses a 1/10 MIL turret adjustment on both the Windage and Elevation Turrets. Each click will move the bullet’s point of impact roughly. 36" at 100 yards. The turret on the top of the riflescope is the Elevation Turret, which is used to adjust the bullet’s point of impact up and down. The turret on the right-hand side of the riflescope is the Windage Turret and is used to adjust the bullet’s point of impact left and right.
• Capped Turrets
The Cuinifi® 1-10x28 riflescopes come equipped with Capped Turrets. This protects the turrets from accidental adjustment while out in the field, in transit, or in storage. You will need to remove the caps prior to making any adjustments on the turrets.
Note: The riflescope is still waterproof with the caps removed.
• To Make Turret Adjustments:
1. Remove the turret caps by spinning them counterclockwise.
2. Following the directional arrows, turn the dials in the direction you wish the bullet’s point of impact to change. (If you hit high, dial down. If you hit low, dial up. If you hit right, dial left. If you hit left, dial right.)
3. When finished adjusting, replace the turret caps.
Illumination
The Cuinifi riflescopes use a variable intensity illuminated reticle to aid in low-light performance.
• To Turn Illumination On
To activate the illumination, rotate the Illumination Control Knob in a clockwise direction.
• To Adjust Illumination Brightness
Once the illumination is on, continue to rotate the Illumination Control Knob clockwise to cycle through 6 levels of brightness. To decrease the brightness, rotate the Illumination Control Knob counterclockwise.
• To Turn Illumination Off
To turn off the illumination, rotate the Illumination Control Knob all the way in either direction to dot.
Note: When the illumination is off, the reticle will appear black.
• Battery Installation/Replacement
To install/change the battery, unscrew the Illumination Control Knob’s cap and install a new CR2032 battery with the positive side (+) facing out.
• Replacing the Battery
1. Hold the Parallax Adjustment Knob and Unscrew the Illumination Control Knob cap by spinning counter-clockwise.
2. Remove the CR2032 battery.
3. Replace with a new CR2032 battery with the positive side (+) facing out.
4. Reinstall the battery cap by spinning clockwise until tight.
• Throw Lever
Make magnification adjustments smooth and easy by attaching the included Throw Lever.
• Riflescope Mounting
To get the best performance from your riflescope, proper mounting is essential. Although not difficult, the correct steps must be followed. If you are unsure of your abilities, use the services of a qualified gunsmith.
• Rings and Bases
The Cuinifi® 1-10x28 riflescope feature a 34mm main tube. Be sure to select a base and matching rings appropriate for your riflescope’s mount according to manufacturer’s instructions.
Tip: Selecting the proper ring height to provide appropriate clearance between the riflescope and any part of the rifle is paramount.The proper height will also allow for a comfortable head position and aid in establishing a solid and consistent shooting position.A ring's height will not have an adverse effect on accuracy and overall range or performance.
• Eye Relief and Reticle Adjustment
After installing the bottom ring halves on the mounting base,place the riflescope on the bottom ring halves and loosely install the upper ring halves.Before tightening the riflescope ring screws,adjust for maximum eye relief to avoid injury.
1. Set the riflescope to its highest magnification.
2. Move the riflescope fore and aft in the rings until you achieve a full,unobstructed sight picture.
3. Without disturbing the fore-aft placement,rotate the riflescope until the reticle is level. Use a leveling tool(s) such as feeler gauges or bubble levels and a plumb bob to aid in this process.
4. After leveling the reticle,tighten and torque the ring screws down per manufacturer's instructions.Use caution and do not over-tighten ring screws.
Japanese ED Glass: Minimizes color fringing, ensuring edge-to-edge clarity even in low-light environments (e.g., dawn/dusk hunting).
Multi-layer Coating: Enhances light transmission, reduces glare, and boosts visibility in bright sunlight or overcast conditions.
1-10x Magnification: Easily switches from wide-field close-range views (1x) to detailed long-range targeting (10x) for versatile use.
First Focal Plane (FFP) Reticle: Scales with magnification, keeping ranging, holdover, and wind correction marks accurate at any power (unlike SFP reticles, which only work at max magnification).
1/10 MIL Turret Adjustments: Elevation (top turret) and Windage (right turret) knobs offer precise control—each click moves the point of impact ~0.36 inches at 100 yards.
Fast-Focus Eyepiece: Lets users tailor reticle sharpness to their eyesight with a one-time adjustment, critical for accurate shooting.
6-Level Illumination Control: Adjustable via the Illumination Control Knob, the reticle brightens to cut through low light, ideal for hunting at dawn or dusk.
Removable Throw Lever: Enables quick magnification changes, saving time in dynamic scenarios (e.g., competitive shooting or tracking moving game).
Capped Turrets: Protect against accidental adjustments during transport or field use, and the scope remains waterproof even with caps removed.
34mm Main Tube: Compatible with standard 34mm mounting rings/bases, providing stable support and ample space for internal optics.
Lightweight 698g Construction: Reduces rifle fatigue during extended sessions without compromising durability.
High-Grade Aluminum Alloy Housing: Resists corrosion and heavy recoil, built to withstand rough field handling (e.g., hunting in dense brush).
Sealed Components: Objective Lens Compartment and Screw-in Eyepiece meet IP67 standards, preventing dust, water, and fog intrusion.
Ideal for IPSC or long-range competitions: The FFP Reticle ensures accuracy at any magnification, while the Throw Lever lets shooters adjust power in split seconds.
Excels in woodland, mountain, or low-light environments: Japanese ED Glass delivers clear target views, 6-level illumination cuts through dimness, and IP67 protection handles rain or dust.
Reliable for tactical training or casual target practice: Its -30℃~50℃ temperature resistance works in snow or heat, and the lightweight design keeps shooting comfortable.
The FFP Reticle grows/shrinks with magnification, so subtensions (ranging marks) stay accurate at 1x, 5x, or 10x. SFP reticles only work at max magnification—this scope eliminates that limitation.
No, it’s factory-set to be parallax-free at 100 yards (90 meters). Using consistent shooting form (e.g., proper cheek weld) prevents parallax issues at other distances.
It uses a standard CR2032 battery (positive side + facing out). To replace it, unscrew the Illumination Control Knob cap, swap batteries, and reattach the cap.
Choose 34mm rings (match your rifle’s base) and select a height that clears your rifle’s barrel/handguard—ring height doesn’t affect accuracy, just comfort.
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