Description
Rifle Scope Product Details
Monstrum Tactical 3-9×40 First Focal Plane (FFP) Rifle Scope with Illuminated BDC Reticle and Adjustable Objective
The Monstrum Tactical FFPS3940-R is a precision tactical scope with a first focal plane reticle and an adjustable objective (AO) lens. With a magnification range from 3-9x magnification, capable of fast, precision close to mid range targeting at distances of up to 600+ yards.
The FFPS3940-R comes equipped with:
– Adjustable 3-9x magnification for targeting out to 600 yards and beyond
– A functionally designed first focal plane range finder reticle for faster range estimation and holdover correction
– An adjustable objective, or AO, lens – allowing for sharper focus of the target image, elimination of parallax, and range estimation – adjustable via an easily accessible side focus dial
– Etched reticle visible with or without illumination, allowing for better reticle visibility at night or in low light environments
– Responsive touch-button reticle illumination switch, for rapid reticle illumination adjustment with minimal movement
– 1/4 MOA/click windage and adjustment knobs with resettable zeroes and turret locks to prevent slippage.
– Aircraft grade 6061 aluminum construction
– A sealed, nitrogen charged scope tube for resistance to fog and water
The FFPS3940-R weighs 1 pound 6 ounces. It has a 30mm diameter tube and requires 30mm diameter scope rings. The Eyepiece Outside Diameter is 44mm. The Objective Lens Segment outside diameter is 49mm
The package also includes:
– A pair of heavy duty medium profile 30mm picatinny scope rings.
– A detachable anti-reflective honeycomb filter sunshade, for reducing outward glare from your scope lens to help conceal your position.
– A set of bikini style see-through lens covers for protecting your scope lenses when not in use.
– A felt drawstring carrying bag for storage and transport of your rifle scope when unmounted.
– One CR2032 3V battery for powering your scope’s reticle illumination
Rifle Scope Product Features
About this item
High precision tactical rifle scope with 3-9x magnification, a 40mm objective lens, and an eye relief of 4-4.5 inches
Functionally designed first focal plane rangefinder reticle, with easy-to-read ranging information that remains constant regardless of magnification, for faster range estimation and holdover correction
Equipped with an adjustable objective lens – or AO – that allows for sharper focus of the target image, elimination of parallax, and range estimation
Touch-button controlled reticle illumination in both red and green with multiple brightness intensities, for better reticle visibility at night or in low light in environments
Package also includes set of medium profile picatinny scope rings, a detachable honeycomb filter sunshade, a set of bikini-style see-through lens covers, a felt drawstring carrying bag, a lint free cleaning cloth, and one CR2032 3V battery
About the Monstrum Tactical Manufacturer
Monstrum Tactical is a premium manufacturer for long gun scopes, optics, mounts, and other accessories used for guns like rifles and long guns. They innovate and supply their scopes and related products making the most of building materials which are resilient and long lasting. This includes the Monstrum Tactical 3-9×40 First Focal Plane (FFP) Rifle Scope with Illuminated BDC Reticle and Adjustable Objective by Monstrum Tactical. For additional shooting products, visit their website.
Glass Info
Rifle scopes enable you to precisely aim a rifle at various targets by aligning your eye with the target at range. They accomplish this through magnifying the target using a series of lenses within the scope. The scope’s alignment can be dialed in to account for various ecological things like wind speed and elevation to make up for bullet drop.
The scope’s function is to help shooters understand precisely where the bullet will land based on the sight picture you are seeing via the scope as you line up the scope’s crosshair or reticle with the intended point of impact. Many contemporary rifle scopes have about eleven parts which are arranged internally and outside of the scope. These scope parts include the rifle scope’s body, lenses, adjustment dials, focus rings, and other components. Learn about the eleven parts of scopes.
The Types of Rifle Scopes
Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Selecting the optimal type of rifle glass is based around what type of shooting you plan to do.
About First Focal Plane Glass
Focal plane scopes (FFP) include the reticle in front of the zoom lens. These kinds of scopes are beneficial for:
- Quick acquisition, far away kinds of shooting
- Shooting scenarios where computations are minimal
- Experienced shooters who have an idea for their target “hold over” as well as “lead” relationships for their long guns
- Shooters who do not mind the reticle is bigger and takes up more visual sight space than a SFP reticle
Info About Second Focal Plane Glass
Second focal plane optics (SFP) include the reticle to the rear of the magnification lens. In the FFP example with the SFP scope, the 5x “zoom” 100 yard tick reticle measurement would be 1/5th of the non “zoom” tick measurement.
- Long distance styles of shooting where shooters have additional time to make ballistic computations
- Shooting where most shots happen within much shorter ranges and proximities
- Shooters who select a clearer optic picture without room used up by the enlarged FFP reticle
Rifle Optic Zoom
The quantity of zoom a scope provides is identified by the size, thickness, and curvatures of the lenses inside of the rifle scope. The magnification of the scope is the “power” of the scope.
Fixed Power Lens Glass
A single power rifle optic or scope will have a magnification number designator like 4×32. This indicates the magnification power of the scope is 4x power while the objective lens is 32mm. The magnification of this kind of optic can not change considering that it is a set power scope.
Variable Power Lens Rifle Glass Details
Variable power rifle scopes can be adjusted between magnification levels. These types of scopes will list the zoom degree in a configuration such as 2-10×32. These numbers imply the magnification of the scope could be changed in between 2x and 10x power. This also involves the power levels in-between 2 and 10. The power shift is achieved by employing 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 suggested scope powers and the distances where they can be efficiently used. High power scopes will not be as beneficial as lower magnification scopes considering that too much magnification can be a negative aspect depending on your shooting distance. The same idea applies to longer ranges where the shooter needs increased power to see where to properly aim the rifle at the target.
Lens Finish for Rifle Optics
All modern-day rifle scope and optic lenses are covered in special coatings. There are various types and qualities of glass coatings. Lens coating can be an important aspect of a rifle when thinking of high-end rifle optics and targeting units. The lenses are among the most vital components of the optic since they are what your eye sees through while sighting a rifle in on the target. The finishing on the lenses protects the lens surface area and improves anti glare from refracted sunshine and color presence.
Info on Glass Lens Coatings – HD Versus ED
Some rifle glass companies even use “HD” or high-definition lens finishes that use different procedures, polarizations, components, and chemicals to extract separate color ranges and viewable target visibility through lenses. This HD covering is typically used with more costly, high density lens glass which reduces light’s capability to refract through the lens glass. Some scope brands use “HD” to describe “ED” meaning extra-low dispersion glass. ED handles how certain colors are represented on the chromatic spectrum and the chromatic aberration or deviance which is similarly called color distortion or fringing. Chromatic aberration is often noticeable around items with hard outlines as light hits the object from various angles.
Rifle Optic Lens Single Finish Versus Multi-Coating
Different optic lenses can even have various finishes applied to them. All lenses usually have at least some type of treatment or covering applied to them before they are used in a rifle scope or optic assembly. Since the lens isn’t simply a raw piece of glass, they require performance enhancing coatings. It becomes part of the carefully tuned optic. It must have a finishing applied to it so that it will be efficiently functional in numerous kinds of environments, degrees of light (full VS shade), and other shooting conditions.
This lens treatment can safeguard the lens from scratches while minimizing glare and other less useful things experienced in the shooting environment while sighting in with the scope. The quality of a single covered lens depends on the scope manufacturer and how much you paid for it.
Some scope makers similarly make it a point to define if their optic lenses are layered or “multi” covered. Being “better” depends on the maker’s lens treatment innovation and the quality of materials used in building the rifle scope.
Hydrophobic Lens Finishes
Water on an optical lens doesn’t improve retaining a clear sight picture through an optic in any way. Lots of top of the line and premium optic producers will coat their lenses with a hydrophilic or hydrophobic finishing. The Steiner Optics Nano-Protection is a good example of this kind of treatment. It provides protection for the surface area of the Steiner glass lens so the water particles can not bind to it or create surface tension. The outcome is that the water beads roll off of the scope to maintain a clear, water free sight picture.
Rifle Glass Mounting Options
Mounting solutions for scopes come in a couple of choices. There are the basic scope rings which are individually installed to the scope and one-piece scope mounts which cradle the scope. These different kinds of mounts also typically are made in quick release variations which use throw levers which allow rifle shooters to quickly install and dismount the glass.
Hex Key Rifle Glass Ring Mounts
Standard, clamp-on type mounting scope rings use hex head screws to position to the flattop design Picatinny scope mounting rails on rifles. These types of scope mounts use two individual rings to support the optic, and are made from 7075 T6 billet aluminum or similar materials which are designed for long distance accuracy shooting. This form of scope mount is exceptional for rifles which are in need of a durable, unfailing mount which will not change regardless of how much the scope is moved or abuse the rifle takes. These are the style of mounts you should have for a devoted optics system on a long distance scouting or sniper competition rifle that will almost never need to be altered or recalibrated. Blue 242 Loctite threadlocker can additionally be used on screws to protect against the hex screws from wiggling out after they are installed securely in position. An example of these rings are the 30mm type made by the Vortex Optics brand. The set normally 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 quickly connect and detach a scope from a rifle. If they all use a comparable style mount, a number of scopes can often be swapped in the field. The quick detach mount style is CNC crafted from anodized 6061 T6 aluminum and the mounting levers connect nicely 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 back on the rifle while maintaining accuracy. These kinds of mounts come in convenient for rifles which are moved a lot, to remove the scope from the rifle for protection, or for aiming systems which are employed in between multiple rifles. An example of this mount type is the 30mm mount from the Vortex Optics brand. It usually costs around $250 USD
Scope Tube Sealing and Gas Purging
Moisture inside your rifle optic can spoil a day of shooting and your costly optic by causing fogging and creating residue inside of the scope tube. Most optics prevent moisture from going into the optical tube with a system of sealing O-rings which are waterproof. Normally, these water resistant optics can be submerged underneath 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 standard use rifles, unless you plan on taking your rifle boating and are concerned about the scope still functioning if it is submerged in water and you can still retrieve the rifle.
Gas Purged Scope Tubes
Another element of preventing the buildup of moisture within the rifle optic tube is filling the tube with a gas like nitrogen. Because this area is currently occupied by the gas, the scope is less altered by climate alterations and pressure variations from the outdoor environment which may possibly 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.
