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You are here: Home / Rifle Scopes / Discovery optical Rifle Scope Bubble Level for 1in / 30mm Tube Riflescope Anti-cant used for Shooting and Hunting
Discovery Optical Rifle Scope 1 Discovery optical Rifle Scope Bubble Level for 1in / 30mm Tube Riflescope Anti-cant used for Shooting and Hunting
Discovery Optical Rifle Scope 2 Discovery optical Rifle Scope Bubble Level for 1in / 30mm Tube Riflescope Anti-cant used for Shooting and Hunting
Discovery Optical Rifle Scope 3 Discovery optical Rifle Scope Bubble Level for 1in / 30mm Tube Riflescope Anti-cant used for Shooting and Hunting
Discovery Optical Rifle Scope 4 Discovery optical Rifle Scope Bubble Level for 1in / 30mm Tube Riflescope Anti-cant used for Shooting and Hunting
Discovery Optical Rifle Scope 5 Discovery optical Rifle Scope Bubble Level for 1in / 30mm Tube Riflescope Anti-cant used for Shooting and Hunting
Discovery Optical Rifle Scope 6 Discovery optical Rifle Scope Bubble Level for 1in / 30mm Tube Riflescope Anti-cant used for Shooting and Hunting
Discovery Optical Rifle Scope 7 Discovery optical Rifle Scope Bubble Level for 1in / 30mm Tube Riflescope Anti-cant used for Shooting and Hunting

Discovery optical Rifle Scope Bubble Level for 1in / 30mm Tube Riflescope Anti-cant used for Shooting and Hunting

Was $8.80 - check current price

Check Out Discovery optical Rifle Scope Bubble Level for 1in / 30mm Tube Riflescope Anti-cant used for Shooting and Hunting. See Great Rifle Scopes By Discovery Optical.

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SKU: 51bf406c59b3 Category: Rifle Scopes Tag: rifle scope
  • Description
  • Additional information

Description

Rifle Scope Product Details

Discovery optical Rifle Scope Bubble Level for 1in / 30mm Tube Riflescope Anti-cant used for Shooting and Hunting
All type available:
Upgrade Type1: for 25.4mm tube scope
Upgrade Type2: for 30mm tube scope
Upgrade Type3: for 34mm tube scope
Product specifications:
Place of Origin: China (Mainland)
Brand Name: ApexHorizon Optics
Type: Scope Mounts & Accessories
Ring Diameter: 25.4/30mm/34mm(1/1.1/1.3in)
Material: Full Aluminum Alloy
Thickness: 10mm
Used On: Rifle Scope
Fit scope: 1inch, 30mm and 34mmTube Scope
Lock: head screw
Color: Matte Black Finish
Package: OPP Bag
Weight: 24g(1in),18g(30mm),20g(34mm)
OEM: Yes
Product features :
Technology improved to be more durable and scratch-proof and looks more better
Light and visible as possible to more easy to measuring the horizontal
Use this bubble level to make sure your gun level shooting the target
Mounts quickly and easily to the riflescope tube
About ApexHorizon Optics :
ApexHorizon Optics is an outstanding outdoor brand from China. Its dreams to build a scope with better clarity and shock proof for large-caliber, which allowed the shooters acquire their target quickly, and to hit targets in all weather and lighting conditions. The meaning of ApexHorizon Optics is that to see the unknown world, to know what you don’t know, to face what you know.
Covered By Lifetime Warranty – ApexHorizon Optics Bulletproof 100% Money Back Guarantee. We promise you always get what more than you paid here.

Rifle Scope Product Features

Replace the 6mm diameter bubble level with 8mm bubble level to make it more visible on your rifle scope
The thickness of bottom is only 2mm(for 30mm and 34mm) or 4.4mm(for 25.4mm)
It is easy to install and to mount anywhere on scope tube left or right side, the ring is so light to carry and cannot block you view of hunting
Makes it easy to maintain a perfect horizontal hold during extreme-range shooting
Viscous fluid: No matter what circumstance, it always exists one bubble

About the Discovery Optical Company

Discovery Optical is a premium manufacturer for firearm scopes, optics, mounting solutions, and other accessories used for guns like rifles and long guns. They create and build their scopes, mounts, and related products by making the most of elements which are long lasting and resilient. This includes the Discovery optical Rifle Scope Bubble Level for 1in / 30mm Tube Riflescope Anti-cant used for Shooting and Hunting by Discovery Optical. For additional shooting products, visit their site.

What You Need to Know About Glass

Rifle scopes permit you to specifically align a rifle at different targets by aligning your eye with the target over a distance. They accomplish this through zoom by using a set of lenses within the scope. The scope’s alignment can be adapted for consideration of different ecological considerations like wind speed and elevation increases to account for bullet drop.

The scope’s function is to help the shooter understand exactly where the bullet will hit based upon the sight picture you are viewing via the optic as you align the scope’s crosshair or reticle with the intended target. Many contemporary rifle optics have around eleven parts which are arranged within and on the exterior of the scope body. These parts consist of the rifle scope’s body, lenses, elevation dials, objective focus rings, and other parts. Learn about the eleven parts of glass.

The Types of Rifle Scopes

Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. The kind of focal plane an optic has determines where the reticle or crosshair is located relative to the scopes zoom. It simply implies the reticle is located behind or ahead of the magnifying lens of the optic. Deciding upon the best sort of rifle scope is based upon what type of hunting or shooting you anticipate doing.

First Focal Plane Glass

Focal plane scopes (FFP) include the reticle in front of the zoom lens. These types of scopes are useful for:

  • Quick acquisition, far away types of shooting
  • Shooting circumstances where estimations are minor
  • Experienced shooters who know their aim point “hold over” and “lead” correlations for their weapon
  • Shooters who do not mind the reticle is enlarged and uses up more visual sight area than a SFP reticle

Second Focal Plane Optics

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

  • Long distance types of shooting where shooters have more time to make ballistic computations
  • Shooting where most of the shots happen within much shorter distances and ranges
  • Shooters who select a clearer optic sight picture with less area taken up by the larger size FFP reticle

About Rifle Glass Zoom

The amount of zoom a scope offers is figured out by the diameter, thickness, and curvatures of the lenses inside of the rifle scope. The zoom of the scope is the “power” of the scope.

About Single Power Lens Rifle Optics

A single power rifle scope or optic will have a magnification 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 change given that it is a fixed power scope.

Adjustable Power Lens Scope Details

Variable power rifle scopes use enhanced power. The power adjustment is handled using the power ring part of the scope near the rear of the scope by the eye bell.

Power Levels and Range

Here are some advised scope power settings and the ranges where they may be effectively used. Always remember that high power optics and scopes will not be as effective as lower magnification level optics due to the fact that excessive magnification can be a bad thing. The exact same concept applies to longer ranges where the shooter needs enough power to see exactly where to best aim the rifle at the target.

Details on Lens Coatings

All modern rifle scope lenses are layered. Lens finish can be an important element of a rifle when thinking about high end rifle optics and scope systems.

About Lens Coatings – HD Versus ED

Some optic suppliers also use “HD” or high-def lens finishings that employ different procedures, elements, polarizations, and chemical applications to enhance various color ranges and viewable definition through lenses. This high-def finish is often used with greater density glass which lowers light’s potential to refract through the lens glass. Some scope producers use “HD” to describe “ED” indicating extra-low dispersion glass. ED deals with how colors are presented on the chromatic spectrum and the chromatic difference or aberration which is also called color distortion or fringing. Chromatic aberration can be noticeable over items with well defined shapes as light hits the object from specific angles.

Scope Lens Single Finishing Versus Multi-Coating

Different optic lenses can also have different coatings used to them. All lenses usually have at least some type of treatment or finish applied to them prior to being used in a rifle scope or optic.

Single layered lenses have a treatment applied to them which is generally a protective and improving multi-purpose treatment. This lens treatment can preserve the lens from scratches while lowering glare and other less advantageous things experienced in the shooting environment while sighting in with the scope. The quality of a single coated lens depends on the scope designer and how much money you spent on it. Both the make and cost are indications of the lens quality.

Some scope makers also make it a point to define if their optic lenses are coated or “multi” covered. This suggests the lens has numerous treatments applied to the surfaces. If a lens gets multiple treatments, it can prove that a manufacturer is taking numerous actions to fight various natural aspects like an anti-glare covering, a scratch resistant anti-abrasion covering, followed by a hydrophilic finish. This additionally doesn’t always imply the multi-coated lens will perform much better than a single coated lens. Being “better” hinges on the maker’s lens treatment innovation and the quality of materials used in creating the rifle glass.

Anti-water Rifle Glass Lens Coating

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 scope companies will coat their lenses with a hydrophilic or hydrophobic anti-water covering.

Rifle Scope Installation Alternatives

Installing solutions for scopes are available in a couple of choices. There are the basic scope rings which are separately installed to the scope and one-piece mounts which cradle the scope. These various kinds of mounts also usually come in quick release variations which use throw levers which allow rifle shooters to rapidly install and remove the scope.

Hex Key Rifle Scope Rings

Basic, clamp design mounting optic rings use hex head screws to mount to the flattop style Picatinny scope mount rails on rifles. These types of scope mounts use two individual rings to support the scope, and are normally constructed from 7075 T6 billet aluminum which are made for long distance precision shooting. This form of scope mount is exceptional for rifles which require a resilient, unfailing mount which will not shift no matter just how much the scope is moved or abuse the rifle takes. These are the style of mounts you want for a faithful optics system on a reach out and touch someone scouting or tournament long gun which will almost never need to be modified or adjusted. Blue 242 Loctite threadlocker can additionally be used on screws to keep the hex screw threads from backing out after they are mounted firmly in place. An example of these rings are the 30mm type from Vortex Optics. The set typically costs around $200 USD

Quick-Release Cantilever Rifle Glass Rings

These types of quick-release rifle scope mounts can be used to rapidly attach and take off a scope from a rifle. If they all use a comparable style mount, a number of scopes can also be swapped out. The quick detach design is CNC crafted from anodized 6061 T6 aluminum and the mounting levers attach firmly to a flat top design Picatinny rail. This allows the scope to be sighted in while on the rifle, taken off of the rifle, and remounted while keeping precision. These types of mounts are useful and convenient for shooting platforms which are transferred a lot, to remove the optic from the rifle for protection, or for aiming systems which are chosen for use between multiple rifles. An example of this mount type is the 30mm mount designed by Vortex Optics. It normally costs around $250 USD

Rifle Glass Tube Sealing and Gas Purging

Wetness inside your rifle glass can mess up a day on the range and your highly-priced optic by inducing fogging and producing residue within the scope’s tube. Most scopes protect against wetness from entering the optical tube with a series of sealing O-rings which are water resistant. Typically, these water resistant optics can be immersed within 20 or 30 feet of water before the water pressure can force moisture past the O-rings. This should be sufficient wetness avoidance for conventional use rifles for hunting and sporting purposes, unless you anticipate taking your rifle sailing and are worried about the scope still functioning if it goes over the side and you can still recover the rifle.

Rifle Optic Gas Purging

Another element of preventing the accumulation of wetness inside of the rifle optic tube is filling the tube with a gas like nitrogen. Given that this area is already occupied by the gas, the scope is less influenced by condition alterations and pressure distinctions from the external environment which might possibly enable water vapor to leak in around the seals to fill the vacuum which would otherwise be there. These are good qualities of a good rifle scope to look for.

Additional information

Category

Rifle Scopes

Brand

Discovery Optical

ASIN

B019FBBEWC

Reviews

Over 368

Reviews Rating

4.3 out of 5 stars

Shipping

FREE Shipping

Best Sellers

Last update on August 19, 2026 // Source: Amazon API

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