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 / Sun Optics USA KS-AP41650 4-16X50 Target/SW Parallax/Fine Cross Hair Rifle Scope
Sun Optics USA Rifle Scope 1 Sun Optics USA KS-AP41650 4-16X50 Target/SW Parallax/Fine Cross Hair Rifle Scope

Sun Optics USA KS-AP41650 4-16X50 Target/SW Parallax/Fine Cross Hair Rifle Scope

Was $353.54 - check current price

Check Out Sun Optics USA KS-AP41650 4-16X50 Target/SW Parallax/Fine Cross Hair Rifle Scope. See Great Rifle Scopes By Sun Optics USA.

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: 3f93c2194a93 Category: Rifle Scopes Tag: rifle scope
  • Description
  • Additional information

Description

Rifle Scope Product Details

Sun Optics USA KS-AP41650 4-16X50 Target/SW Parallax/Fine Cross Hair Rifle Scope
You love to shoot. When you do, you want accuracy you can feel good about. But do you really want to pay more for your optics than you paid for your firearm we’re sun optics USA. We engineer our optics with the same glass and specs as the big Boys. Only we’re small. Which means we’re not corporate. And because we work with top suppliers and small factories, we can control both our costs and our quality. Our optics are designed here in the us of a with top-notch components to give you clarity. A wide field of view. And superior light transmission. All adjustments work confidently. Our optics consistently hold zero. And here’s the best part: we offer a 100 percent Lifetime replacement warranty. Scopes. Mounts. Accessories. They’re all right here. And they’re calling your name. Shoot with one and see.

Rifle Scope Product Features

Precision ground, fully multi coated optics
Unique optical construction provides extra wide angle
100 percent waterproof, shockproof and fog proof
Fast Focus Eyepiece

About the Sun Optics USA Company

Sun Optics USA is a premium manufacturer for firearm scopes, optics, mounts, and other components used for firearms like rifles and long guns. They style and build their products by choosing building materials which are resilient and long lasting. This includes the Sun Optics USA KS-AP41650 4-16X50 Target/SW Parallax/Fine Cross Hair Rifle Scope by Sun Optics USA. For additional shooting products, visit their website.

Rifle Scope Facts

Rifle scopes allow you to exactly aim a rifle at various targets by aligning your eye with the target at range. They accomplish this through magnifying the target by employing a series of lenses within the scope. The scope’s positioning can be adapted for consideration of varied ecological things like wind and elevation decreases to account for bullet drop.

The scope’s function is to understand exactly where the bullet will land based on the sight picture you are viewing through the optic as you align the scope’s crosshair or reticle with the target. Most modern rifle scopes and optics have about 11 parts which are arranged inside and outside of the optic. These parts include the rifle scope’s body, lenses, modification turrets, focus rings, and other parts. See all eleven parts of an optic.

Rifle Optic Types

Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Picking the finest type of rifle scope depends on what type of shooting you plan to do.

Info on First Focal Plane Glass

Focal plane scopes (FFP) feature the reticle in front of the zoom lens. This causes the reticle to increase in size based on the amount of zoom being used. The result is that the reticle measurements are the same at the enhanced range as they are at the non amplified distance. As an example, one tick on a mil-dot reticle at one hundred yards with no “zoom” is still the same tick at 100 yards with 5x “zoom”. These types of scopes work for:

  • Quick acquisition, long distance kinds of shooting
  • Shooting situations where computations are small
  • Experienced shooters who understand their target “hold over” as well as “lead” relationships for their firearms
  • Shooters who do not mind the reticle is enlarged and requires more visual sight room than a SFP reticle

About Second Focal Plane Glass

Second focal plane optics (SFP) include the reticle behind the magnification lens. In the FFP example with the SFP scope, the 5x “zoom” one hundred yard tick measurement would be 1/5th of the non “zoom” tick reticle measurement.

  • Far away types of shooting where shooters have extra time to make ballistic computations
  • Shooting where most of the shots take place within shorter ranges and proximities
  • Shooters who would like a clearer optic picture with less room used up by the larger size FFP reticle

Optic Zoom

The quantity of scope zoom you require depends upon the form of shooting you intend to do. Nearly every type of rifle glass offers some degree of magnification. The amount of magnification a scope offers is identified by the size, thickness, and curvatures of the lenses inside of the rifle scope. The magnification of the optic is the “power” of the glass. This implies what the shooter is observing through the scope is magnified times the power element of what can normally be seen by human eyes.

About Fixed Single Power Lens Scopes

A single power rifle optic or scope comes with a zoom number designator like 4×32. This means the zoom power of the scope is 4x power while the objective lens is 32mm. The magnification of this kind of scope can not adjust since it is set from the factory.

Info on Adjustable Power Lens Optics

Variable power rifle scopes can be changed between magnification power levels. It will list the magnification amount in a configuration like 2-10×32. These numbers indicate the magnification of the scope can be changed between 2x and 10x power. This also incorporates the power levels in-between 2 and 10. The power modification is achieved utilizing the power ring part of the scope near the back of the scope by the eye bell piece.

The Power and Range Correlation of Optics

Here are some advised scope power settings and the distances where they could be efficiently used. Remember that high magnification scopes will not be as effective as lower powered glass because too much magnification can be a detractor. The exact same concept applies to longer ranges where the shooter needs to have increased power to see precisely where to best aim the rifle at the target.

Lens Finish for Rifle Scopes

All contemporary rifle scope lenses are covered in special coatings. There are various types and qualities of glass finishes. Lens finishing is a crucial aspect of a rifle’s setup when thinking of high end rifle optics and scope equipment. The glass lenses are one of the most critical components of the scope given that they are what your eye looks through while sighting a rifle in on the point of impact. The finish on the lenses shields the lens surface and also helps with anti glare from excess daylight and color exposure.

Info on Lens Coatings – HD Versus ED

Some scope producers likewise use “HD” or high-definition lens finishes which use different techniques, chemicals, aspects, and polarizations to draw out separate colors and viewable definition through the lens. Some scope makers use “HD” to refer to “ED” meaning extra-low dispersion glass.

Info on Single Covering Versus Multi-Coating

Various optic lenses can also have different coverings applied to them. All lenses generally have at least some type of treatment or finish applied to them before they are used in a rifle scope or optic. This is since the lens isn’t just a raw piece of glass. It is part of the finely tuned optic. It needs to have a covering put on it so that the lens will be optimally usable in lots of types of environments, degrees of sunlight (full VS shaded), and other shooting conditions.

Single coated lenses have a treatment applied to them which is typically a protective and boosting multi-purpose treatment. This lens treatment can protect the lens from scratches while reducing glare and other less advantageous things experienced in the shooting environment while sighting in with the optic. The quality of a single covered lens depends upon the scope company and just how much you spent on it. The scope’s maker and cost are indications of the lens quality.

Some scope makers likewise make it a point to define if their optic lenses are coated or “multi” covered. This implies the lens has had several treatments applied to them. If a lens receives numerous treatments, it can indicate that a manufacturer is taking several actions to combat different environmental factors like an anti-glare finish, a scratch resistant anti-abrasion covering, followed by a hydrophilic finish. This additionally doesn’t always imply the multi-coated lens will perform better than a single layered lens. Being “better” depends on the manufacturer’s lens treatment technology and the quality of glass used in building the rifle scope.

Anti-water Finish for Rifle Glass

Water on a lens does not assist with keeping a clear sight picture through a scope at all. Many top of the line and military grade optic companies will coat their lenses with a hydrophilic or hydrophobic covering which is water repellent.

Rifle Optic Installing Choices

Installing solutions for scopes can be found in a couple of options. There are the basic scope rings which are separately mounted to the scope and one-piece mounts which cradle the scope. These different types of mounts also usually can be found in quick release variations which use toss levers which permit rifle operators to rapidly mount and remove the scope.

Hex Key Rifle Glass Rings

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

Quick-Release Cantilever Rifle Glass Ring Mounting Solutions

These types of quick-release rifle scope mounts can be used to quickly remove a scope and connect it to a different rifle. Numerous scopes can also be switched out if they all use a compatible design mount. These types of mounts are handy for rifles which are transported a lot, to swap out the optic from the rifle for protecting the scope, or for optics which are used between multiple rifles or are situationally focused.

Sealing and Gas Purging for Rifle Scope Tubes

Moisture inside your rifle scope can ruin a day on the range and your highly-priced optic by inducing fogging and making residue inside of the scope’s tube. Most scopes protect against moisture from getting in the optical tube with a system of sealing O-rings which are water resistant. Generally, these water resistant optics can be immersed beneath 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be sufficient wetness avoidance for standard use rifles, unless you anticipate taking your rifle on boats and are worried about the optic still working if it is submerged in water and you can still rescue the rifle.

What to Know About Glass Tube Gas Purging

Another component of preventing the accumulation of moisture inside of the rifle scope tube is filling the tube with a gas like nitrogen. Since this space is currently taken up by the gas, the optic is less influenced by temp shifts and pressure differences from the outside environment which may potentially allow water vapor to permeate in around the seals to fill the vacuum which would otherwise exist. These are good qualities of a decent rifle scope to look for.

Additional information

Category

Rifle Scopes

Brand

Sun Optics USA

ASIN

B00I3FVO04

Reviews

Over 1

Reviews Rating

4.0 out of 5 stars

Prime

Amazon Prime

Shipping

FREE Shipping by Amazon

Best Sellers

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

Customers Also Liked

  • Vector Optics Rifle Scope 1 Vector Optics Marksman 3.5-10x44mm, 1/10 MIL, 30mm Tube, Second Focal Plane (SFP) Hunting Riflescope

    Vector Optics Marksman 3.5-10x44mm Second Focal Plane (SFP) 1/10 MIL Hunting Riflescope with MP Reticle, 30mm Tactical Mount Rings, Lens Covers and Honeycomb Sunshade

    Was $222.00 - check current price
    Shop Deal
  • Vector Optics Rifle Scope 1 Vector Optics Arbiter 1-4x24mm 1/2 MOA Compact Tactical Riflescope and Side Picatinny Rail QD Mount Combo (Matte Black)

    Vector Optics Arbiter 1-4x24mm 1/2 MOA Compact Tactical Riflescope and Side Picatinny Rail QD Mount Combo (Matte Black)

    Was $189.99 - 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
  • 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

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