Last update on June 29, 2022 // Source: Amazon API
Rifle Scope Product Details
Monstrum 1-4×20 Rifle Scope with Offset Cantilever Scope Mount and Flip Up Lens Covers
Rifle Scope Product Features
About this item
Tactical rifle scope providing crystal clear targeting at 1-4x magnification for close to mid range shooting, with a 20mm objective diameter and an eye relief of 3.5-3.8 Inches
Glass rangefinder reticle for on-the-fly range estimation and long distance targeting
Lever controlled reticle illumination in both red and green with multiple brightness intensities
Includes a one-piece offset cantilever scope mount offering 2 inches of forward extension, allowing for flexible scope placement and optimum eye relief
Includes a set of Monstrum Tactical Rubberized Flip Up Scope Lens Covers to protect your lenses from dust and abrasion
The Monstrum Tactical S1420-R-RG is a reliable tactical scope great for close to mid-range shooting. Crystal clear optics with 1-4x magnification. Rangefinder reticle for faster range estimation and holdover correction. All Monstrum scopes tubes are nitrogen filled for resistance to water and fog.
This scope has 1/2 MOA/click windage/elevation adjustments with the ability to lock the turrets and reset the zero.
The etched black reticle is always visible without illumination or can be lit red or green for better reticle visibility at night or low light environments.
With the built-in throw lever, moving the magnification ring can be done with ease for quick yardage adjustments.
Multi-layer lens coating, protects your scope lens from scratches, and fog, while improving the clarity of your vision.
Includes: 1-4×20 Rifle Scope, Standard Medium Profile (Black Scope), Detachable Throw Lever, CR1632A Battery, Lens Cloth, Lens Cover
Reticle: Illuminated Rangefinder
Materials: 6061 Aircraft Grade Aluminum
Compatibility: Rifles with Picatinny Rails
Scope Range: Mid-Range, Up to 500 Yards.
Objective Diameter: 20 mm
Tube Size: 1 in
Eye Relief: 3.5-3.8 in
Weight: 11 oz
High Quality Construction
Crafted from aircraft grade aluminum, the scope is both sturdy and lightweight, with a 1 in sealed tube. The scope is 8.5″ in length, 2.0″ in width, 1.8″ in height and 11 oz in weight. It comes with lens covers and one 3V CR1632 battery.
Reticle: Illuminated Range Finder Illuminated Range Finder
6061 Aircraft Grade Aluminum
Compatible with Picatinny Style Rifles
Scope Range: Mid-Range, Up to 500 Yards. Mid-Range, Up to 500 Yards.
Magnification: 1-4x 1-4x
Objective Diameter: 20mm 20mm
Tube Size: 1 in 1 in
Eye Relief: 3.5-3.8 in 3.5-3.8 in
Scope Rings: Standard Offset
Flip Up Lens Covers:
About the Monstrum Scope Maker
Monstrum is a premium manufacturer for firearm scopes, optics, mounting solutions, and other add-ons used for guns like rifles and long guns. They innovate and supply their products working with building materials which are long lasting and durable. This includes the Monstrum 1-4×20 Rifle Scope with Offset Cantilever Scope Mount and Flip Up Lens Covers by Monstrum. For additional shooting products, visit their website.
What You Need to Know About Optics
Rifle scopes allow you to precisely aim a rifle at different targets by lining up your eye with the target over a distance. They do this through zoom by making use of a set of lenses inside the scope. The scope’s alignment can be adjusted to take into account varied environmental considerations like wind speed and elevation decreases to account for bullet drop.
The scope’s purpose is to understand precisely where the bullet will land based upon the sight picture you are viewing via the scope as you align the scope’s crosshair or reticle with the target. The majority of modern-day rifle scopes have about 11 parts which are located within and on the exterior of the scope body. These optic pieces include the rifle scope’s body, lenses, windage and elevation dials, focus rings, and other elements. See all eleven parts of a scope.
About Glass Types
Rifle scopes can be either “first focal plane” or “second focal plane” style of scopes. The style of focal plane an optic has identifies where the reticle or crosshair lies in relation to the optic’s magnifying adjustments. It simply implies the reticle is behind or in front of the magnification lens of the optic. Picking the most suitable form of rifle optic is based on what type of shooting or hunting you intend on doing.
First Focal Plane Scopes
Focal plane scopes (FFP) feature the reticle in front of the magnification lens. This induces the reticle to increase in size based upon the level of magnification being used. The outcome is that the reticle measurements are the same at the amplified range as they are at the non amplified range. As an example, one tick on a mil-dot reticle at 100 yards without “zoom” is still the same tick at one hundred yards with 5x “zoom”. These kinds of scopes work for:
- Quick acquisition, long distance types of shooting
- Shooting situations where calculations are very little
- Experienced shooters who know their aim point “hold over” and “lead” ratios for their rifles
- Shooters who do not mind the reticle is bigger and uses up more visual eyesight area than a SFP reticle
About Second Focal Plane Scopes
Second focal plane glass (SFP) come with the reticle to the rear of the magnifying lens. This causes the reticle to remain at the same size in connection with the quantity of magnification being used. The final result is that the reticle dimensions change based on the magnification used to shoot over longer ranges considering that the markings present distinct increments which can vary with the zoom level. In the FFP illustration with the SFP optic, the 5x “zoom” 100 yard tick would be 1/5th of the non “zoom” tick measurement. These particular sorts of optics work for:
- Long distance kinds of shooting where shooters have additional time to make ballistic calculations
- Shooting where most shots occur within much shorter distances and ranges
- Shooters who select a clearer optic sight picture with less area taken up by the enlarged FFP reticle
Zoom for Rifle Scopes
The amount of zoom a scope offers is figured out by the size, density, and curvatures of the lenses inside of the rifle scope. The zoom of the scope is the “power” of the scope.
Fixed Single Power Lens Glass Info
A single power rifle optic and scope will have a zoom number designator like 4×32. This means the magnification power of the scope is 4x power while the objective lens is 32mm. The magnification of this kind of scope can not fluctuate given that it is a fixed power optic.
Adjustable Power Lens Scope Facts
Variable power rifle scopes can be adjusted between magnification increments. These types of scopes will note the zoom amount in a format such as 2-10×32. These numbers indicate the magnification of the scope could be changed in between 2x and 10x power. This also includes the power levels in-between 2 and 10. The power adaptation is achieved by employing the power ring component of the scope near the rear of the scope by the eye bell.
The Power Level and Range Correlation of Rifle Scopes
Here are some suggested scope power levels and the distances where they can be efficiently used. High power glass will not be as efficient as lower magnification level scopes considering too much magnification can be a bad thing. The very same idea goes for extended ranges where the shooter needs to have sufficient power to see exactly where to properly aim the rifle.
Lens Finishing for Glass
All modern-day rifle scope lenses are layered. There are different types and qualities of finishes. When considering luxury rifle targeting systems, Lens finishing can be a vital element of defining the capability of the rifle. The lenses are among the most essential parts of the optic due to the fact that they are what your eye sees through while sighting a rifle in on the target. The finish on the lenses safeguards the lens surface and also improves anti glare capabilities from refracted daylight and color visibility.
HD Versus ED Lenses
Some scope brands likewise use “HD” or high-definition lens finishings which use different techniques, polarizations, chemicals, and components to draw out a wide range of colors and viewable definition through the lens. Some scope manufacturers use “HD” to refer to “ED” to signify the lens has extra-low dispersion glass.
Single Glass Lens Finish Versus Multi-Coating
Different optic lenses can likewise have various finishes used to them. All lenses normally have at least some type of treatment or covering applied to them prior to being used in a rifle scope or optic.
This lens treatment can protect the lens from scratches while reducing glare and other less beneficial things experienced in the shooting environment while sighting in with the scope. The quality of a single covered lens depends on the scope maker and how much you paid for it.
Some scope producers similarly make it a point to specify if their optic lenses are coated or “multi” covered. Being “much better” depends on the producer’s lens treatment innovation and the quality of materials used in developing the rifle scope.
Info on Anti-water Covering
Water on a scope’s lens does not improve preserving a clear sight picture through an optic whatsoever. Numerous top of the line or high-end optic makers will coat their lenses with a hydrophilic or hydrophobic finishing. The Steiner Optics Nano-Protection is a fine example of this kind of treatment. It deals with the exterior of the Steiner scope lens so the H2O particles can not bind to it or create surface tension. The outcome is that the water beads move off of the scope to maintain a clear, water free sight picture.
Optic Installation Options
Installing options for scopes are available in a few choices. There are the basic scope rings which are separately installed to the scope and one-piece scope mounts which cradle the scope. These different types of mounts also normally are made in quick release versions which use toss levers which allow rifle shooters to quickly install and remove the glass.
Glass Mounting Solutions with Hex Key Rings
Basic, clamp design mounting optic rings use hex head screws to install to the flattop style Picatinny scope mount rails on the tops of rifles. These forms of scope mounts use a pair of detached rings to support the scope, and are made from 7075 T6 billet aluminum or similar materials which are manufactured for far away precision shooting. This form of scope mount is very good for rifles which require a durable, unfailing mount which will not shift regardless of how much the scope is moved or abuse the rifle takes. These are the design of mounts you want for a faithful scope setup on a reach out and touch someone scouting or sniper competition rifle which will rarely need to be modified or recalibrated. Blue 242 Loctite threadlocker can additionally be used on the mount’s screws to stop the hex screws from wiggling out after they are installed securely in place. An example of these mounting rings are the 30mm type from Vortex Optics. The set usually costs around $200 USD
Rifle Scope Mounting Solutions with Quick-Release Cantilever Rings
These types of quick-release rifle scope mounts can be used to rapidly connect and detach a scope from a rifle before reattaching it to a different rifle. Numerous scopes can even be swapped out if they all use a similar design mount. These types of mounts are handy for long guns which are transferred a lot, to remove the optic from the rifle for protecting the scope, or for scopes which are used in between numerous rifles.
Glass Tube Sealing and Gas Purging
Moisture inside your rifle scope can ruin a day of shooting and your expensive optic by triggering fogging and developing residue inside of the scope tube. The majority of scopes prevent wetness from entering the scope tube with a system of sealing O-rings which are waterproof.
Gas Purged Scope Tubes
Another element of preventing the accumulation of wetness within the rifle optic tube is filling the tube with a gas like nitrogen. Considering that this area is already occupied by the gas, the glass is less influenced by temperature alterations and pressure distinctions from the outside 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.