High Speed BBs

  • Home
  • Real Steel
    • AR-15 Builder
    • About AR-15 Suppressors
    • Suppressor Covers
  • Learn About Airsoft
    • Airsoft Guns
    • How Airsoft Guns Work
    • Airsoft Pistols
    • Airsoft BBs
    • Rifle Scopes
    • Tactical Hand Signals
    • Airsoft Snipers
    • Fix Airsoft Guns
    • Game Rules
    • Airsoft Glossary
    • Play Airsoft
      • Find Airsoft Fields Nearby
      • Best Places to Play Airsoft
      • Top Stores
      • Store Finder
        • States & Cities
        • Store Reviews
      • Field Finder
  • Gun Reviews
    • Best Airsoft Sniper Rifles
    • The Coolest Airsoft Guns
    • Best Glock Pistols
    • Top Airsoft CO2 Pistols
    • Best KWA M4 Airsoft AEGs
    • Top Valken Airsoft AEGs
    • SMG Airsoft Guns <$200
    • Spring Airsoft Guns <$100
  • Gear Reviews
    • Best Airsoft BB Reviews
    • Top Tactical Airsoft Vests
    • MOLLE Pouch Reviews
    • Top-rated Airsoft Masks
    • Best Airsoft Goggles
    • Optimal Field Gear
    • Daily Deals & Discounts
    • Build Your Toolkit
  • Shop
    • Airsoft Rifles
    • Airsoft Pistols
    • Airsoft BBs
    • Airsoft Goggles
    • Airsoft Masks
    • Airsoft Tactical Vests
    • Tactical Pouches
You are here: Home / Rifle Scopes / Mobo 3-9×40 Riflescope
Mobo Rifle Scope 1 Mobo 3-9x40 Riflescope
Mobo Rifle Scope 2 Mobo 3-9x40 Riflescope
Mobo Rifle Scope 3 Mobo 3-9x40 Riflescope
Mobo Rifle Scope 4 Mobo 3-9x40 Riflescope
Mobo Rifle Scope 5 Mobo 3-9x40 Riflescope
Mobo Rifle Scope 6 Mobo 3-9x40 Riflescope

Mobo 3-9×40 Riflescope

Was $36.90 - check current price

Check Out Mobo 3-9×40 Riflescope. See Great Rifle Scopes By Mobo.

Shop Deal

Highspeedbbs editors select and review airsoft products independently. We may earn affiliate commissions from buying links, which help support our testing. Support us.

SKU: 5c3bd19dbc24 Category: Rifle Scopes Tag: rifle scope
  • Description
  • Additional information

Description

Rifle Scope Product Details

Mobo 3-9×40 Riflescope
Specifications:
Magnification: 3-9X
Objective diameter: 40mm
Color: Black
Material: Aluminum alloy
Length: 1.0 feet
Weight: 0.77lb
Package weight: 527g / 1.16lb
Package List:
1 * Riflescope
1 * Lens Cap
1 * Mount
1 * Wrench
1 * Cleaning Cloth
1 * User Manual (English)

Rifle Scope Product Features

About the Mobo Brand

Mobo is a premium supplier for firearm scopes, optics, mounting solutions, and other components used for firearms like rifles and long guns. They innovate and make their mounts, scopes, and related products choosing materials which are long lasting and resilient. This includes the Mobo 3-9×40 Riflescope by Mobo. For additional shooting items, visit their site.

Information Rifle Optics

Rifle scopes permit you to precisely align a rifle at various targets by aligning your eye with the target over a distance. They do this through magnification by making use of a series of lenses inside the scope. The scope’s positioning can be adapted for consideration of numerous environmental elements like wind speed and elevation increases or decreases to make up for bullet drop.

The scope’s function is to help shooters understand exactly where the bullet will hit based on the sight picture you are seeing using the optic as you align the scope’s crosshair or reticle with the intended target. The majority of modern rifle scopes and optics have about 11 parts which are located internally and externally on the scope body. These optic pieces consist of the rifle scope’s body, lenses, modification dials or turrets, focus rings, and other components. See all eleven parts of a scope.

Rifle Optic Types

Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Picking the optimal type of rifle optic is based on what type of shooting you plan on doing.

About First Focal Plane Scopes

Focal plane scopes (FFP) feature the reticle in front of the zoom lens. This triggers the reticle to increase in size based upon the amount of magnification being used. The result is that the reticle measurements are the same at the amplified distance as they are at the non magnified range. For example, one tick on a mil-dot reticle at 100 yards without any “zoom” is still the very same tick at 100 yards using 5x “zoom”. These kinds of scopes are practical for:

  • Quick acquisition, far away kinds of shooting
  • Shooting circumstances where estimations are low
  • Experienced shooters who understand their target “hold over” and “lead” correlations for their weapon
  • Shooters who do not mind the reticle is bigger and uses up more visual eyesight room than a SFP reticle

Info on Second Focal Plane Optics

Second focal plane optics (SFP) feature the reticle to the rear of the magnifying lens. This induces the reticle to stay at the very same size in connection with the volume of zoom being used. The outcome is that the reticle measurements alter based upon the zoom used to shoot over greater ranges considering that the markings represent distinct increments which vary with the zoom level. In the FFP illustration with the SFP glass, the 5x “zoom” one hundred yard tick reticle measurement would be 1/5th of the non “zoom” tick measurement. These particular varieties of optics work for:

  • Long distance styles of shooting where shooters have additional time to make ballistic estimations
  • Shooting where most of the shots happen within shorter ranges and distances
  • Shooters who choose a clearer optic sight picture without area used up by the enlarged FFP reticle

Magnification for Glass

The quantity of scope zoom you need is based on the type of shooting you intend to do. Virtually every style of rifle glass provides some level of zoom. The volume of zoom a scope supplies is determined by the dimension, density, and curvatures of the lens glass within the rifle scope. The zoom of the scope is the “power” of the scope. This suggests what the shooter is aiming at through the scope is magnified times the power aspect of what can typically be seen by human eyes.

Fixed Power Lens Glass Facts

A single power rifle scope will have a magnification number designator like 4×32. This implies the zoom power of the scope is 4x power and the objective lens is 32mm. The zoom of this kind of scope can not change since it is a fixed power scope.

About Adjustable Power Lens Rifle Glass

Variable power rifle scopes use variable power levels. The power modification is performed by using the power ring part of the scope near the back of the scope by the eye bell.

The Power Level and Range of Rifle Scopes

Here are some advised scope power levels and the distances where they can be effectively used. Bear in mind that higher power scopes and optics will not be as practical as lower powered optics and scopes because excessive zoom can be a detractor. The very same idea relates to longer distances where the shooter needs increased power to see where to properly aim the rifle.

About Lens Coating

All contemporary rifle glass lenses are covered. Lens covering can be a vital aspect of a rifle system when thinking about high end rifle optics and scope setups.

About Optic Lens Coatings – HD Versus ED

Some scope manufacturers additionally use “HD” or high-def lense finishes which employ various processes, aspects, rare earth compounds, and polarizations to draw out various color ranges and viewable target visibility through the lens. This high-definition finishing is typically used with greater density glass which lowers light’s ability to refract by means of the lens glass. Some scope makers use “HD” to refer to “ED” implying extra-low dispersion glass. ED deals with how certain colors are represented on the chroma spectrum and the chromatic deviance or aberration which is also called color distortion or fringing. Chromatic aberration may be noticeable over objects with hard shapes as light hits the object from specific angles.

Single Covering Versus Multi-Coating for Rifle Glass

Various optic lenses can also have various coatings used to them. All lenses generally have at least some type of treatment or finish used to them prior to being used in a rifle scope or optic.

This lens treatment can protect the lens from scratches while decreasing glare and other less helpful things experienced in the shooting environment while sighting in with the scope. The quality of a single coated lens depends on the scope manufacturer and how much you paid for it.

Some scope producers also make it a point to define if their optic lenses are layered or “multi” coated. Being “much better” depends on the producer’s lens treatment innovation and the quality of products used in developing the rifle scope.

Anti-water Optic Lens Finish

Water on a lens does not assist with preserving a clear sight picture through a scope at all. Many top of the line and high-end optic makers will coat their lenses with a hydrophobic or hydrophilic covering.

Alternatives for Installing Rifle Optics on Firearms

Mounting solutions for scopes can be found in a few options. There are the standard scope rings which are separately installed to the scope and one-piece scope mounts which cradle the scope. These various kinds of mounts also generally come in quick release variations which use manual levers which permit rifle operators to rapidly mount and dismount the scope.

Rifle Optic Mounting Solutions with Hex Key Rings

Normal, clamp design mounting scope rings use hex head screws to mount to the flattop design Picatinny scope installation rails on rifles. These types of scope mounts use two separate rings to support the optic, and are made from 7075 T6 billet aluminum which are developed for long range precision shooting. This type of scope mount is excellent for rifles which need a long lasting, sound mount which will not move no matter how much the scope is moved or abuse the rifle takes.

Quick-Release Cantilever Scope Ring Mounting Solutions

These types of quick-release rifle scope mounts can be used to rapidly take off a scope and attach it to a different rifle. Numerous scopes can even be swapped out if they all use a compatible design mount. These types of mounts are convenient for long guns which are transferred a lot, to remove the optic from the rifle for protection, or for optics which are used between several rifles.

Glass Tube Sealing and Gas Purging

Wetness inside your rifle optic can ruin a day of shooting and your pricey optic by inducing fogging and generating residue inside of the scope tube. A lot of optics prevent wetness from entering the scope tube with a series of sealing O-rings which are water resistant. Normally, these water resistant optics can be submerged beneath 20 or 30 feet of water before the water pressure can push moisture past the O-rings. This should be plenty of moisture prevention for common use rifles, unless you anticipate taking your rifle aboard watercrafts and are concerned about the scope still working if it falls overboard and you can still find the gun.

Gas Purged Rifle Glass Tubes

Another part of avoiding the buildup of moisture within the rifle optic tube is filling the tube with a gas like nitrogen. Considering that this area is currently occupied by the gas, the optic is less altered by condition shifts and pressure differences from the outside environment which may possibly permit water vapor to leak in around the seals to fill the void which would otherwise be there. These are good qualities of a good rifle scope to look for.

Additional information

Category

Rifle Scopes

Brand

Mobo

ASIN

B01G5CJ94O

Reviews

Over

Best Sellers

Last update on October 5, 2026 // Source: Amazon API

Customers Also Liked

  • Vector Optics Rifle Scope 7 Vector Optics Arbiter 1-4x24mm 1/2 MOA Compact Tactical Riflescope with Red Dot Illuminated Reticle (Matte Black)

    Vector Optics Arbiter 1-4x24mm 1/2 MOA Compact Tactical Riflescope with Red Dot Illuminated Reticle (Matte Black)

    Was $169.00 - check current price
    Shop Deal
  • Vector Optics Rifle Scope 1 Vector Optics Taurus 3-18x50mm First Focal Plane (FFP) 1/10 MIL Tactical Riflescope with Red Illuminated Reticle, Free 30mm Mount Rings, Lens Covers and KillFlash

    Vector Optics Taurus 3-18x50mm First Focal Plane (FFP) 1/10 MIL Tactical Riflescope with Red Illuminated Reticle, Free 30mm Mount Rings, Lens Covers and KillFlash

    Was $399.00 - check current price
    Shop Deal
  • Vector Optics Rifle Scope 1 Vector Optics GEN II Everest 3-18x50 Hunting Long Eye Relief Tactical Riflescope Scope

    Vector Optics GEN II Everest 3-18×50 Hunting Long Eye Relief Tactical Riflescope Scope

    Was $190.00 - check current price
    Shop Deal
  • Vector Optics Rifle Scope 1 Vector Optics Hugo 6-24x50 Second Focal Plane (SFP) Riflescope with Illuminated Center Dot BDC Reticle, 25.4mm Tube, 1/4 MOA Per Adjustment, Turret Lock System, Free Mount Rings, Lens Caps, Sunshade

    Vector Optics Hugo 6-24×50 Second Focal Plane (SFP) Riflescope with Illuminated Center Dot BDC Reticle, 25.4mm Tube, 1/4 MOA Per Adjustment, Turret Lock System, Free Mount Rings, Lens Caps, Sunshade

    Was $195.00 - check current price
    Shop Deal

Our Links

Home
Terms of Service
Privacy Policy
Affiliate Link Policy
FTC Disclosure
Mission Statement
Media Kit
Marketplace
Contact Us

Shop Gear

Shop All
Airsoft Rifles
Airsoft Pistols
Airsoft BBs
Airsoft Goggles
Airsoft Masks
Tactical Vests
Tactical Pouches
Gun Cases

Product Disclaimer

We make great efforts to maintain reliable information on all airsoft and tactical products presented on High Speed BBs. However, the product information listed on highspeedbbs.com is provided without warranty. Users should always check the manufacturer's official website for warranties, user manuals, terms (if any), and product details. The airsoft product offers that appear on the website are from respective airsoft industry companies, suppliers, and stores from which High Speed BBs receives compensation. This compensation may impact how and where products appear on this site (including, for example, the order in which they appear). This site does not include all airsoft products or all available product offers.

Amazon Associate Disclosure

Amazon Disclosure: Highspeedbbs is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. FTC Disclosure: Some links may be affiliate links. We may get paid if you buy something or take an action after clicking one of these. You can learn more about this from our affiliate policy, terms of service, and privacy policy.

Brand Disclosure

Brand Disclosure: Product names, logos, brands, and other trademarks featured or referred to within our content and website are the intellectual property of their respective trademark holders. Any reference in this website to third party trademarks, brands, or logos is to identify the corresponding third party goods and/or services.

© 2026 HighSpeed BBs. All Rights Reserved